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Mullen Fire

Unit Information

Medicine Bow National Forest
U.S. Forest Service
2468 Jackson Street
Laramie, WY 82070

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Mullen Fire Daily Update for 9-23-2020

Mullen Fire Wildfire
News – 9/23/2020

Aircraft continue to be critical to the Mullen Fire suppression effort. Yesterday, helicopters delivered more than 22,000 gallons of water that supported the work of firefighters on the ground by cooling the fire’s edge and slowing its rate of spread.  Fixed wing aircraft, including CL-415 scoopers and smaller scooping aircraft – fire bosses – were also used on the east side of the fire in the Rambler area. 

Fire managers have assigned personnel and other resources to focus on values at risk, such as evacuated communities of Rambler, Keystone communities, Lake Creek, the Rob Roy Reservoir area and the City of Cheyenne water supply. The Structure Protection Group is in each community, clearing brush and installing sprinkler systems to prepare structures for possible fire progression to those areas. Engines and hand crews are working on the western edge to secure the fire perimeter to prevent spread to the west onto private property. 

In other areas, fire managers are scouting the terrain for opportunities where firefighters can be successful in slowing fire progression.  

Fire Conditions and Weather
Dry dead and down fuels, low humidity, and gusty winds have contributed to active fire behavior, even throughout the night. Later this week, fire weather is expected to become critical, with strong west/southwest winds, very low humidity, and above-normal temperatures. 

Mandatory Evacuations

  • Lake Creek community 
  • Rambler community
  • Rob Roy community
  • Keystone communities: Keystone proper, lower Keystone, Langford/Ricker, Moore's Gulch, and 507C cabin grouping

Pre-Evacuation Notice

  • Private land along Fox Creek Road
  • The communities of Albany and Centennial, extending northwest along Highway 130 
  • All areas west of Highway 11 in the valley.

Closures and Restrictions
Temporary Flight Restriction 
A Temporary Flight Restriction is in effect for the fire area ( For the safety of all firefighters, all private aircraft – including drones – must avoid this area. If you fly, we can’t!

Forest Closure 
A Forest area closure is in effect surrounding the Mullen Fire. For details, see the Forest Closure Order ( or the Forest Closure Area Map (

Stage 2 Fire Restrictions are in effect for the fire area

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