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Blue Mountains mystery tours by ghost bus

Katoomba area in Blue Mountains National Park

Open, check current alerts 

Current alerts in this area

Last reviewed: Tue 6 December 2022, 4.29pm

Applies from Sat 9 Apr 2022, 1.03pm. Last reviewed: Tue 6 Dec 2022, 4.29pm.

Closed areas: Parts of Blue Mountains National Park closed

Many walking tracks, roads and fire trails within Blue Mountains National Park remain closed following sustained wet weather causing subsidence hazards, major landslides or infrastructure upgrades. 

The following areas are closed:

Katoomba and Leura

  • Honeymoon Bridge is closed due to rockfall risk
  • Federal Pass between Leura Forest and Dardanelles Pass junction below the Three Sisters is closed due to track maintenance.
  • Gordon Falls track and lookout are closed due to major upgrades.
  • Lone Lyrebird track is closed between Gordon Road and the War Memorial, due to major subsidence.  Detour in place.
  • Lyrebird Dell walking track is closed due to track maintenance.
  • Lillian's Bridge track is closed from Inspiration Point track to Lillians Bridge due to major upgrades. 
  • Lady Carrington lookout is closed for a major upgrade.
  • Prince Henry Cliff walk is closed between Gordon Falls lookout and Olympian lookout, due to landslides. Visit the Blue Mountains City Council website for information.
  • Prince Henry Cliff walk is closed between Echo Point and Cliff View lookout due to major upgrades.
  • Lady Darley track is closed due to major upgrades on Prince Henry.
  • Amphitheatre track is closed due to track repairs.
  • Glenraphael Drive is closed due to major subsidence. Narrow Neck and Golden Stairs are accessible to pedestrians and cyclists from Narrow Neck lookout on Cliff Drive.
  • Ruined Castle and Mount Solitary walking routes are closed due to subsidence.
  • Six Foot Track is closed from Nellies Glen to Megalong Valley. 
  • Lindeman Pass is closed due to a major landslide below Gladstone lookout. 

Wentworth Falls

  • McMahons Lookout Rd will be closed to all traffic from Thursday 1st December until Wednesday 21st December to allow for road improvements.  Red Ridge, Erskine Range (W5) and Centre Mount Fire trails are also included in this closure.  
  • Kings Tableland Road will be closed to all traffic (apart from residential traffic)  from Thursday 1st December until Wednesday 21st December to allow for road improvements.  Access to Andersons Fire Trail available on weekends.  
  • Valley of the Waters track is closed below Sylvia Falls. There is no access to Roberts Pass, Vera Falls, Hippocrene Falls or Wentworth Falls from Valley of the Waters.
  • Charles Darwin walk is closed where it traverses Council-managed land due to upgrades. Visit the Blue Mountains City Council website for information.
  • National Pass is closed due to landslide.
  • Wentworth Pass is closed due to landslide.
  • Kedumba Valley Road is closed south of the Sublime Point Fire Trail due to major subsidence. 
  • Kedumba River campground closed until Friday 9th December due to subsidence on the access road.
  • Ingar Road is closed where it traverses private property at the west end. Ingar campers must walk in via Anderson's or Bedford Roads.

Blackheath, Medlow Bath, Megalong Valley, Mount Victoria and Bells Line of Road

  • Govetts Leap lookout and picnic area are closed for major upgrade work. (opening February 2023)
  • Evans lookout is closed to vehicles for major upgrade work with detours in place. (opening mid December)
  • Grand Canyon car park closed, limited parking at Neates Glen and along Evans Lookout Road. (opening mid December)
  • Grose Valley and Govetts Gorge access routes are closed including Horse track, and Rodriguez Pass (Bridal Veil Falls) due to landslides.
  • Grose River track is closed from Blue Gum Forest to Victoria Falls. (opening mid December)
  • Pulpit walking track and Pulpit Rock lookout are closed. Visit the Blue Mountains City Council website for information.
  • Perrys Lookdown camping area is closed.

Woodford, Lawson

  • Bedford Road and Murphy's Glen camping area are closed to vehicles due to slippery conditions and to protect road surface.
  • Empire Pass is closed for track maintenance.

Canyons and rock climbing

  • Climbing and canyoning areas in the Blue Mountains are open unless the access road is closed or the site is listed in this alert.

Penalties apply for non-compliance. For more information, please contact the local office.

 

If you plan on embarking on Grade 5 tracks or undertaking off-trail activities, please be aware of the likelihood of changed conditions and consider current safety advice.

Grade 5 tracks and off-trail areas are open, excluding those listed below. Grade 5 tracks are for very experienced bushwalkers with specialised skills such as advanced navigation and emergency first aid. Please visit this page for further information on track grades.

Closed Grade 5 tracks:

  • Vera Falls and Hippocrene Falls walking tracks
  • Horse track
  • Rodriguez Pass
  • Govetts Descent
  • Mount Solitary loop due to landslides near Ruined Castle
  • Open: K2K (Kanangra to Katoomba) access available via Narrow Neck lookout track, Dunphy's campground, and from Kanangra Walls. Due to the ongoing wet conditions, Coxs River can flood at short notice and may be impassable. Walkers should check conditions before departing.

Affects 32 locations in this park: Show list

Applies from Mon 28 Nov 2022, 7.00am to Mon 19 Dec 2022, 7.30pm. Last reviewed: Mon 5 Dec 2022, 10.30am.

Closed areas: Mount Portal and Tunnel View lookouts closed

Mount Portal and Tunnel View lookouts are closed for roadworks and safety upgrades from Monday 28 November to Monday 19 December 2022.

Penalties apply for non-compliance. For more information, contact the local NPWS office on 02 4720 6200.

Affects 2 locations in this park: Show list

Applies from Wed 10 Aug 2022, 4.24pm to Tue 28 Feb 2023, 4.24pm. Last reviewed: Mon 5 Dec 2022, 10.12am.

Closed areas: Govetts Leap lookout

The visitor precinct at Govetts Leap lookout in Blue Mountains National Park, Blackheath is closed for upgrades from Thursday 11 August 2022 to February 2023.

The carpark and lookout will be closed during construction.

Blue Mountains Heritage Centre and the toilets at Govetts Leap lookout will remain open.

Access to walking tracks will be provided to tracks that are open. Track closures are updated regularly. Check the NPWS alerts page for updates.

The works include improvements to the lookout and carpark, and construction of new accessible pathways in the area.

The upgrades are part of the NSW government infrastructure investment. More detail can be found on the DPE Blue Mountains Community Engagement webpage or by calling Blue Mountains Heritage Centre on 02 4787 8877.

Affects 1 location in this park: Show list

Applies from Thu 1 Dec 2022, 5.14pm to Thu 22 Dec 2022, 5.14pm. Last reviewed: Mon 5 Dec 2022, 10.03am.

Closed areas: Kings Tableland Road

Kings Tableland Road and access to Anderson fire trail within Blue Mountains National Park will be closed on weekdays from Thursday 1 December until Thursday 22 December 2022 to allow for road repairs.  Residential access permitted. 

Penalties apply for non-compliance. For more information, contact the NPWS Heritage Centre on 02 4787 8877.

Affects 1 location in this park: Show list

Applies from Thu 1 Dec 2022, 10.55am to Wed 14 Dec 2022, 10.57am. Last reviewed: Mon 5 Dec 2022, 10.01am.

Closed areas: McMahons Lookout Road

McMahons Lookout Road within Blue Mountains National Park is closed to all traffic including walkers, from Thursday 1 December until Wednesday 22nd December 2022 for road improvements.  This closure also includes Red Ridge, Erskine Range (W5) and Centre Mount fire trails.  

Penalties apply for non-compliance. For more information, contact the NPWS Blue Mountains Heritage Centre on 02 4787 8877.

Affects 1 location in this park: Show list

Applies from Thu 7 Jul 2022, 9.11am. Last reviewed: Mon 5 Dec 2022, 9.25am.

Safety alerts: Colong-Oberon stock route - 4WD only access

The 4WD Oberon Colong historic stock route to Yerranderie is only accessible via 4WD vehicles. Recent wet weather has caused slippery conditions with large muddy sections and some deep pot holes. Some creek crossings may be inaccessible for vehicles with low clearance.

Please drive carefully and be aware of road conditions. For more information, call the Wollondilly Shire Council on 02 4677 1100.

Affects 2 locations in this park: Show list

Applies from Thu 8 Sep 2022, 12.00pm to Mon 19 Dec 2022, 10.00pm. Last reviewed: Mon 28 Nov 2022, 10.53am.

Closed areas: Woodford Oaks fire trail closed on weekdays

Woodford Oaks trail will be closed on weekdays from Thursday 8 September to Monday 19 December 2022, due to roadworks.

Heavy earthmoving equipment including trucks will be in operation. There is no visitor access during this time.

Woodford Oaks trail and the following areas will be open to cyclists and walkers on weekends. There will be no vehicle access in these areas:

  • Woodford Oaks fire trail for cyclists
  • Red Hands Cave 
  • Nepean lookout
  • Erskine Creek
  • Jack Evans walking track
  • Pisgah Rock
  • Machins Crater

Red Hands Cave walking track is still accessible during this period from Glenbrook Causeway to Red Hands Cave only via Campfire Creek walking track.

Penalties apply for non-compliance. For more information, contact the local NPWS area office on 02 4720 6200.

Affects 4 locations in this park: Show list

Applies from Sun 22 Mar 2015, 2.11pm. Last reviewed: Mon 21 Nov 2022, 10.02am.

Closed areas: Waratah Native Gardens picnic area closed

Waratah Native Gardens picnic area is closed until further notice. This includes Gorge walking track. No access to the area is permitted. 

Penalties apply for non-compliance. For more information, please contact the NPWS Hawkesbury-Nattai area office on 02 4588 2400.

Applies from Wed 16 Nov 2022, 3.39pm. Last reviewed: Mon 21 Nov 2022, 9.44am.

Other planned events: Notice of ground pest control operation

NSW National Parks and Wildlife Service (NPWS) will be undertaking a ground trapping and shooting program targeting pigs in southern Blue Mountains National Park, Yerranderie State Conservation Area and Yerranderie Regional Park (Warragamba Special Areas) until Saturday 24 December 2022.

Do not enter closed areas. Penalties apply for non-compliance. For more information contact the NPWS Oberon area office on 02 6336 6200.

Applies from Mon 14 Feb 2022, 7.42am. Last reviewed: Mon 14 Nov 2022, 12.08pm.

Other incidents: Oaks Singles track closed for maintenance

Maintenance works are underway on Oaks Singles track from Friday 28 January 2022 until further notice, due to erosion issues and major safety concerns.

The track will undergo vegetation maintenance followed by the addition of sandstone surface. The works are to stabilise some sections and rock armouring in poorly drained sections.

In conjunction with roadworks on Woodford Oaks fire trail, Oaks Singles track will be open on Saturdays and Sundays.

For more information, call the local NPWS office on 02 4720 6200.

Affects 1 location in this park: Show list

Applies from Thu 3 Nov 2022, 10.57am to Mon 1 May 2023, 10.58am. Last reviewed: Wed 2 Nov 2022, 2.39pm.

Other planned events: Notice of 1080 ongoing program

From Thursday 3 November 2022 to Monday 1 May 2023 NSW National Parks and Wildlife Service (NPWS) is conducting ongoing ground baiting program in the following areas: 

  • Abercrombie River National Park
  • Kanangra-Boyd National Park
  • Blue Mountains National Park (southern sector)
  • Wollemi National Park (Wolgan Valley area) 
  • Jenolan Karst Conservation Area
  • Turon National Park
  • Marrangaroo National Park

The operation will use 1080 (sodium fluoroacetate) poison for the control of wild dogs and foxes.

The program is designed to minimise predator impacts on wildlife, especially threatened species, and to minimise impact of wild dogs on neighbouring stock.

Signs will be placed at the entry to the baiting location. Domestic pets are not permitted in NSW National Parks managed lands. Pets and working dogs may be affected (1080 is lethal to cats and dogs). Pets and working dogs must be restrained or muzzled in the vicinity and must not enter the baiting location. In the event of accidental poisoning seek immediate veterinary assistance.

Please contact the local Kanangra NPWS area office at Oberon on 02 6336 6200 for more information.

Applies from Mon 4 Jul 2022, 4.48pm. Last reviewed: Tue 29 Nov 2022, 10.55am.

Closed areas: Ingar Road partial closure

There is no access vehicle or pedestrian access to the section of Ingar Road past the end of Queen Elizabeth Drive. Please do not enter private property.

This means there is no vehicle access to Ingar campground. Campers must hike in via Andersons fire trail or Bedford Road.

Penalties apply for non-compliance. For more information, please contact the local office.

Affects 2 locations in this park: Show list

Applies from Sat 16 Jul 2022, 1.30pm. Last reviewed: Tue 20 Sep 2022, 2.31pm.

Safety alerts: Grose Valley walking tracks - Experienced walkers only

Walking tracks that are open in the Grose Valley (Blue Mountains National Park) may become indistinct with fallen trees and wash outs due to recent flood events. Experienced walkers only. 

For more information, contact the NPWS Blackheath Heritage Centre on 02 4787 8877. 

Affects 3 locations in this park: Show list

Nearby alerts

Applies from Mon 10 Oct 2022, 9.00am to Fri 23 Dec 2022, 11.59pm. Last reviewed: Mon 5 Dec 2022, 12.07pm

Closed areas: Deep Pass access roads closed

Access to Deep Pass will be closed until 22 December due to road works to repair road damage from storm events.

Visitors are reminded to exercise caution on the roads, particularly following sustained periods of rainfall.

Penalties apply for non-compliance. For more information, contact the NPWS Kanangra area office on 02 6336 6200.

Affects 1 park and 1 location nearby. Show list

Applies from Tue 29 Nov 2022, 9.30am to Sat 10 Dec 2022, 9.34am. Last reviewed: Mon 5 Dec 2022, 11.34am

Closed areas: Glow Worm Tunnel Road closed at Galah Mountain Road intersection

Glow Worm Tunnel Road on the Newnes Plateau is closed from the Galah Mountain Road intersection until Saturday 10 December 2022. Please note:

  • This closure includes access to Glow Worm Tunnel carpark and the Old Coach Road carpark
  • There is no walker access to Glow Worm Tunnel during this time
  • Glow Worm Tunnel carpark is expected to open from Saturday 10 December 2022 at this stage
  • Galah Mountain Road and access to Rocky Creek canyon is open.

This closure is to allow for upgrade works at the Glow Worm Tunnel carpark.

Penalties apply for non-compliance. For more information, contact the NPWS Oberon area office on 02 6336 6200.

Affects 1 park and 1 location nearby. Show list

Applies from Thu 2 Jun 2022, 3.56pm to Tue 28 Feb 2023, 11.59pm. Last reviewed: Fri 2 Dec 2022, 6.53am

Closed areas: Big Yango precinct closure

The Big Yango precinct in Yengo National Park is closed from Thursday 2 June 2022 to Wednesday 1 March 2023 for repair and maintenance work.

Penalties apply for non-compliance. For more information, call the NPWS Wollemi/Yengo area office on 02 6574 5555.

Affects 1 park and 5 locations nearby. Show list

Applies from Mon 23 May 2022, 10.55am to Tue 31 Jan 2023, 10.55am. Last reviewed: Mon 28 Nov 2022, 11.06am

Closed areas: Glow Worm Tunnel walking track closed - No access from Wolgan Valley

Glow Worm tunnel walking track is closed until further notice. There is no access from the Wolgan Valley to Glow Worm tunnel due to the Wolgan Road closure.

Penalties apply for non-compliance. For more information, contact the NPWS Oberon area office on 02 6336 6200.

Affects 1 park and 1 location nearby. Show list

Applies from Sun 20 Nov 2022, 12.00pm to Fri 9 Dec 2022, 2.00pm. Last reviewed: Fri 25 Nov 2022, 8.11am

Closed areas: Area closed for campground upgrade

Finchley campground is closed for an upgrade from 12pm, Sunday 13 November until 2pm, Friday 9 December 2022.

Penalties apply for non-compliance. For more information, contact the local NPWS office.

Affects 1 park and 1 location nearby. Show list

Applies from Mon 28 Mar 2022, 3.37pm. Last reviewed: Mon 5 Dec 2022, 10.48am

Closed areas: Trails closed in Illawarra Escarpment

The following areas are closed until further notice, due to damage from recent severe weather:

  • Mount Kembla Ring track
  • Lower Escarpment fire trail
  • Mount Pleasant management trail
  • O’Briens management trail
  • Staffords management trail

This closure maybe extended further, if rain occurs.

Check Live Traffic NSW for up-to-date information about road closures. For assistance during severe weather visit the NSW SES website. In life-threatening situations call emergency services on Triple Zero (000).

Penalties apply for non-compliance. For more information, contact the local park office.

Affects 1 park nearby. Show list

Applies from Wed 9 Mar 2022, 3.08pm. Last reviewed: Mon 5 Dec 2022, 10.48am

Closed areas: Jingga walking track closed due to landslide

Jingga walking track is closed until further notice. The walking track is currently being repaired or upgraded. As soon as the track can be safely reopened, NPWS alerts will be updated.

Penalties apply for non-compliance. For more information call the NPWS Illawarra area office on 02 4224 4188 or visit the NSW National Parks safety page for park safety guidelines.

Affects 1 park and 1 location nearby. Show list

Applies from Wed 2 Mar 2022, 12.47pm. Last reviewed: Mon 5 Dec 2022, 10.47am

Closed areas: Sublime Point walking track closed

Sublime Point walking track is closed until further notice. The track is currently being repaired or upgraded. As soon as the track can be safely re-opened, NPWS alerts will be updated.

Penalties apply for non-compliance. For more information call the NPWS Illawarra area office on 02 4224 4188 or visit the NSW National Parks safety page for park safety guidelines.

Affects 1 park and 1 location nearby. Show list

Applies from Tue 15 Nov 2022, 3.20pm to Tue 31 Jan 2023, 9.00pm. Last reviewed: Tue 15 Nov 2022, 3.27pm

Closed areas: Park closed due to flooding and flood damage

The following parks are closed from Tuesday 15 November 2022 until Tuesday 31 January 2023 due to recent flooding and flood damage to creek crossings and campgrounds:

  • Abercrombie River National Park
  • Abercrombie River State Conservation Area

Bummaroo Ford campground remains open.

The park will reopen once remediation has occurred to ensure park user safety.

Penalties apply for non-compliance. For more information, please contact the local office.

Affects 2 parks and 2 locations nearby. Show list

Applies from Mon 28 Mar 2022, 12.13pm. Last reviewed: Mon 14 Nov 2022, 10.48am

Closed areas: Mount Keira Ring track partial closure

Mt Keira Ring track is open only between Byarong Park and Robertson Lookout Walking Track. The track section that passes below Mt Keira Lookout is still closed due to a landslip. As soon as the remainder of the track can be safely re-opened, NPWS Alerts will be updated. 

Penalties apply for non-compliance. For more information, contact the local park office.

Affects 1 park and 1 location nearby. Show list

Applies from Mon 21 Nov 2022, 7.00am to Fri 9 Dec 2022, 11.59pm. Last reviewed: Mon 5 Dec 2022, 8.52am

Closed parks: Capertee Valley Reserve Pest Management Operation

Capertee National Park, Gardens of Stone National Park and Mugii Murum-ban State Conservation Area are closed from 9am, Monday 21 November to 5pm, Friday 9 December 2022 for an aerial and ground pest control operation. Penalties apply for non-compliance. For more information, contact the Mudgee Area Office on 02 6370 9000.

Affects 1 park nearby. Show list

Applies from Wed 18 Aug 2021, 5.01pm. Last reviewed: Mon 21 Nov 2022, 9.10am

Closed parks: Prospect Nature Reserve closed public

Prospect Nature Reserve is closed to the public indefinitely as it's part of a Special Water catchment area. There is no public access at any time.

If you wish to visit the Prospect Reservoir area, Andrew Campbell Reserve on William Lawson Drive has picnic tables, playground and toilet facilities.

For more information about visiting Andrew Campbell Reserve, please contact Sydney Water on 13 20 92. 

Affects 1 park nearby. Show list

Applies from Sun 9 Oct 2022, 2.03pm. Last reviewed: Fri 11 Nov 2022, 8.54am

Closed areas: Ben Bullen trail (Moffits trail) closed due to trail damage

The following areas are closed until trail conditions allow repair work to be undertaken:

  • Ben Bullen trail (Moffits trail) from Hutchinson Road heading east to the Gardens of Stone State Conservation Area boundary
  • Baal Bone Gap picnic area 

The trail has several large bog holes that are impassable to all vehicles. Due to these bog holes being impassable there is no through access to Wolgan Road from the Castlereagh Highway.

Remember, it’s never safe to drive, ride or walk through flood waters, so you’ll need to reschedule your visit and avoid travel through areas in this park. Check Live Traffic NSW for up-to-date information about road closures. For assistance during severe weather visit the NSW SES website. In life-threatening situations call emergency services on Triple Zero (000).

Penalties apply for non-compliance. For more information, contact the Mudgee Area office on 02 6370 9000.

Affects 1 park and 2 locations nearby. Show list

Applies from Mon 3 Oct 2022, 11.12am to Tue 10 Oct 2023, 11.15am. Last reviewed: Wed 7 Dec 2022, 7.25am

Safety alerts: River crossings to campgrounds

Vehicle access to the following camping areas is via natural river bed crossings that require 4WD capability, and are subject to flooding:

  • Wollemi National Park - Newnes (Cricket Pitch camping area only)
  • Turon National Park - all camping areas
  • Marrangaroo National Park - main camping area
  • Abercrombie River National Park - all camping areas
  • Kanangra Boyd National Park - Kowmung river crossing

River levels can rise rapidly with heavy rain falling upstream. Please check the weather forecast before leaving home.

Affects 4 parks and 6 locations nearby. Show list

Applies from Tue 19 Apr 2022, 2.40pm to Fri 9 Dec 2022, 4.00pm. Last reviewed: Fri 2 Dec 2022, 8.40am

Other planned events: Notice of ongoing 1080 Program

NSW National Parks and Wildlife Service (NPWS) is conducting an ongoing ground baiting program from Monday 9 May to Wednesday 9 November 2022 in the following parks:

  • Dharug National Park
  • Manobalai Nature Reserve
  • Parr State Conservation Area
  • Wollemi State Conservation Area
  • Yengo National Park  

An aerial baiting program will also be conducted in these parks from Monday 5 September to Friday 16 September 2022. 

The operation will use 1080 (sodium fluoroacetate) poison for the control of wild dogs and foxes.

The program is designed to minimise predator impacts on wildlife, especially threatened species, and to minimise impact of wild dogs on neighbouring stock.

Signs will be placed at the entry to the baiting location. Domestic pets are not permitted in NSW National Parks managed lands. Pets and working dogs may be affected (1080 is lethal to cats and dogs). Pets and working dogs must be restrained or muzzled in the vicinity and must not enter the baiting location. In the event of accidental poisoning seek immediate veterinary assistance.

Please contact the local Bulga NPWS office for more information on 02 6574 5555.

Affects 2 parks and 11 locations nearby. Show list

Applies from Tue 15 Feb 2022, 2.59pm. Last reviewed: Tue 31 May 2022, 8.40am

Closed areas: Shepherds Gully Road closed due to storm damage

Shepherds Gully Road and Sternbecks Line walking track are closed until further notice due to storm damage.

Penalties apply for non-compliance. For more information, please contact the Wollemi Yengo area office on 02 6574 5555. 

Affects 1 park and 1 location nearby. Show list

Applies from Wed 1 Jun 2022, 3.13pm to Tue 31 Jan 2023, 3.59pm. Last reviewed: Mon 20 Jun 2022, 3.23pm

Closed parks: Wombeyan Karst Conservation Reserve planned closure

Wombeyan Karst Conservation Reserve will be closed from Wednesday 1 June 2022 to Tuesday 31 January 2023 for major upgrade works. There will be no public access to any of the reserve, including camping, cabins and caves during this period.

For further information contact Wombeyan Caves office on 02 4843 5976.

Affects 1 park nearby. Show list

Applies from Wed 13 Jan 2021, 12.04pm to Sat 31 Dec 2022, 12.05pm. Last reviewed: Wed 2 Feb 2022, 12.39pm

Closed areas: Lake Eckersley campground

Lake Eckersley campground in Heathcote National Park is closed indefinitely. The nearest remote camp site is located at Kingfisher Pools. 

For further information contact the Audley Visitor Centre on 02 9542 0648.

Affects 1 park and 1 location nearby. Show list

Local alerts

For the latest updates on fires, closures and other alerts in this area, see https://www.nationalparks.nsw.gov.au/things-to-do/guided-tours/blue-mountains-mystery-tours-by-ghost-bus/local-alerts

Park info

See more visitor info

Emergency services

For all NSW fires visit the Rural Fire Service

For the latest information on wildfires in your area please contact the NSW Rural Fire Service.

View all alerts for NSW