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Black Mountain

Unit Information

Beaverhead-Deerlodge National Forest
U.S. Forest Service
420 Barrett St
Dillon, MT 59725

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Alder Creek, Christensen, Trail Creek and Black Mountain Update 8.11.2021

Black Mountain Wildfire
News – 8/11/2021

 Alder Creek, Trail Creek, Christensen, and Black Mountain
Fire Update
August 11, 2021



 Alder Creek 
 Size: 11,800 Acres
 Containment: 10%
 Location: 7 miles west of Wise River, MT
 Start Date: July 8, 2021
  Cause: Unknown
 Total personnel: 375

 Trail Creek
 Size: 35,965 Acres
 Containment: 26%
 Location: 20 miles west of Wisdom, MT
 Start Date: July 8, 2021
  Cause: Lightning
 Total personnel: 213

 Size: 8,766 Acres
 Containment: 10%
 Location: 12 miles west of Wise River, MT
 Start Date: July 16, 2021 Cause: Unknown
 Total personnel: 18

 Black Mountain
 Size: 1,042 Acres Containment: 75% Location: 13 miles south of Jackson, MT
 Start Date: July 17, 2021
 Cause: Lightning
 Total personnel: 41

Alder Creek Fire: A helicopter dropped water for most of the day on the southeast side of the fire near Deno Creek, reducing fire spread. Crews continue to construct control lines northwest of the fire near Calvert Hill. This will provide an anchor point to fight the fire should it move in that direction. Fire engines will continue to patrol Highway 43 and the Pioneer Scenic Byway and test and run sprinklers around structures. 

Christensen Fire: Since the west side of the fire is contained, crews will continue to construct line on the south side of the fire moving east. This line is characterized as direct attack, meaning crews are building line along or very near to the fire’s edge. The containment lines being constructed near Calvert Hill will also provide a control feature to check up or stop the fire should it make it run to the north.

Trail Creek Fire: Three helicopters spent the shift dropping water on the southeast corner of the fire in Idaho. Heavy equipment is being utilized to widen the control line along Gibbonsville road to 100’. This will greatly improve the probability of success for stopping the fire should it reach the road. Structure protection work is complete in Gibbonsville so crews are focused on patrolling and running sprinklers. Along Lost Trail Road, equipment is skidding and decking logs to prepare for their removal before being damaged by fire. The fire continues to move north of Big Hole Battlefield and firefighters are positioned in the park should the fire change direction. Containment lines south of Big Hole continue to hold, preventing the fire from reaching private property. Engines will continue to patrol this area.

Black Mountain Fire: Containment has grown to 75 percent as no fire activity has been observed for over a week. Contingency lines are complete should the situation change. Firefighters will mop up, chip dead and down debris, and monitor.

Fire Weather Today: Today’s temperatures will be 78 to 84 with a minimum relative humidity between 16 to 23 percent and West to Northwest winds at 10 to 13mph with gusts to 25mph. There is a predicted drying trend through the weekend with increasing temperatures and decreasing humidity.

Major Closures:
-Hwy 43 and Pioneer Byway remain open. Motorists are asked to slow down and be on the alert for firefighters, heavy smoke, and downed trees. Please check the Montana DOT Road Report website for current conditions.
-Continental Divide Trail: Closed from Lemhi Pass north to Mussigbrod Creek.
-Big Hole National Battlefield is closed until further notice. North and South VanHouten, Miner Lakes, Twin Lakes, May Creek and Divide Bridge Campgrounds are closed.
-Forest Closure orders are in effect for all three fires.
Beaverhead-Deerlodge NF:
Salmon-Challis NF:

Stage 1 evacuation Highway 43 from Mile Marker 35 to the County Line at Mile Marker 41.5. This includes the residents of Doolittle Creek Road and North Doolittle Creek Road. Southside of Highway 43 from Alder Creek Road to Dickie Bridge. Westside of the Scenic Byway from the Wisdom Airport to Harriette Lou Road. All evacuation status removed in Alder Creek drainage and Southside of Highway 43 from Alder Creek Road to Mile Marker 62.
Lemhi County Sheriff has contacted residences in threatened areas on the west side of the Trail Creek Fire in Idaho and placed in “Set” evacuation status. Info: 208-756-8980.

Alder Creek:
Trail Creek:
Black Mountain:

Fire Information Line: 406‐624‐9452 (8am‐8pm) Email:


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