RED MESA, Colo. (AP) - A 300-acre wildfire near the Colorado-New Mexico border was at least 60 percent contained Friday after cooler temperatures and calmer winds overnight helped firefighting crews.

The fire, in dry grass and pinon and juniper trees on the Ute Mountain Ute Reservation, was about 2.5 miles from the state border and about 6 miles southwest of Red Mesa, San Juan Public Lands spokeswoman Pamella Wilson said.

The blaze, apparently started by lightning Wednesday or Thursday, spread quickly but then stalled when it reached an area that burned last summer.

Burlington Resources Inc. shut down at least 16 of gas wells, including six within the perimeter of the fire. No structures were threatened.

Wilson said four 20-person crews were on the way. A helicopter and four single-engine air tankers were also available.

"We were just hammered for two afternoons in a row kind of west of Durango and near Cortez," Wilson said of the midweek lightning strikes.