A confine-and-contain strategy is being used against the Horse Fire, a lightning-started blaze burning in the Horse Creek drainage about 8 miles north of U.S. Highway 160 and Chimney Rock.

The 90-acre fire is burning in dense standing and downed dead aspen, dense oak brush and steep terrain.

About 60 firefighters, including a hot-shot crew and an initial attack crew, were on scene Friday, according to the San Juan National Forest. Additional resources were expected to arrive. Aerial resources were also helping to limit the spread of the fire and helping firefighters build containment lines.

The confine-and-contain strategy is aimed at protecting values at risk while still protecting firefighters and the public.

Firefighters are building direct control lines, indirect perimeter control lines and using natural features to limit the fire’s spread.

Gretchen Fitzgerald, acting public affairs officer with the San Juan National Forest, said the strategy to fight the fire provides the highest probability of success while actively engaging the fire on terms safe for firefighters and the public.

Smoke from the fire is visible from Bayfield, Ignacio, Durango, Hesperus Hill and Pagosa Springs. The fire was discovered Tuesday.

No structures or private land were threatened as of Friday.

To ensure public and firefighter safety, the San Juan National Forest has closed roads and trails near the fire.

Horse Fire Map