Two helicopters were dropping water on the lightning caused Lost Horse Fire Friday evening.

Tod McKay of the Bitterroot National Forest said the 6 acre fire was 10 miles southwest of Hamlton near Brandy Peak in the Bitterroot Mountains.

He said the fire is in extremely steep terrain near the top of a ridge. It is believed to be holdover lightning strike from Wednesday's early morning storms.

Rappellers, fire fighters who are trained to drop near a fire from ropes on a helicopter, are en route to the fire.

The wind has been moving the fire toward the east in the Darby Ranger District.