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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 8.12.21

Black Mountain Wildfire
News – 8/12/2021

Alder Creek, Trail Creek, Christensen, and Black Mountain

Fire Update

August 12, 2021



Alder Creek
Size: 11, 999 Acres
Containment: 10%
Location: 7 miles west of Wise River, MT
Start Date: July 8, 2021
Cause: Unknown
Total personnel: 375

Trail Creek
Size: 36,076 Acres
Containment: 26%
Location: 20 miles west of Wisdom, MT
Start Date: July 8, 2021
Cause: Lightning
Total personnel: 213

Size: 8,806 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 on the southeast side of the fire near Deno Creek as hand crews improved lines to reduce fire spread. No major fire movement was seen. Crews are continuing to clear and improve the road system near Calvert Hill. This will provide an anchor point to fight the fire should it move in that direction. More work is expected along the Pioneer Scenic Byway as Fire engines will continue to patrol it and Highway 43, testing and running sprinklers around structures. 

Christensen Fire: Crews have made slow and steady progress constructing line on the south side of the fire moving east. This work is very close to the fire’s edge. Fire remained active on the north side of the fire near Trident Peak and Toomey drainage, but was not growing. The containment lines being constructed near Calvert Hill will also provide a control feature to check up or stop the fire should it make a run to the north.

Trail Creek Fire: Helicopters continued to drop water near Three-Mile Ridge on the southeast corner of the fire in Idaho. Heavy equipment is widening the control line along Gibbonsville Road. 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. The fire continues to move north of Big Hole Battlefield and firefighters are positioned to catch the fire in the grassy areas with natural water barriers to assist in stopping the fire. 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 is steady at 75 percent as no fire activity has been observed for over a week. Contingency lines are complete should the situation change. Firefighters will chip debris produced from road improvement work and will continue to monitor the area.

Fire Weather Today: Today’s temperatures will be 75 to 85 with a minimum relative humidity between 18 to 25 percent and Northwest winds at 8 to 10 mph with gusts of 15 to 20mph. An evening wind shift from the North and Northeast could affect fire behavior on South-facing slopes. 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 on 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)

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