HELENA (AP) -- A fire that started in Idaho west of Wisdom became a Montana fire Saturday as it burned deeper into heavy stands of timber on the Beaverhead-Deerlodge National Forest.

Several other fires around the state also expanded overnight, and the attack on a new fire near Glacier National Park was taken over by an interagency team of expert fire managers.

The Blackwall Fire in extreme western Montana doubled in size to 900 acres by Saturday, all of the growth coming on the Montana side of the border.

"What it's burning on the Montana side is miles and miles of Lodgepole pine," said Jack de Golia, spokesman for the Beaverhead-Deerlodge National Forest. "There's unbroken, unlimited fuel ahead of it."

The 260 firefighters on the fire abandoned their camp near the fire line for safety reasons and set up their base camp at Lost Trail Pass, spokeswoman Gail Baer said.

"It's not a good idea to have a camp within a quarter-mile of the fire when it gets this intense," she said.

The fire is within three or four miles of Highway 43. The May Creek Campground and a nearby rental cabin were closed, along with trails near the fire.

Another fire on the Beaverhead-Deerlodge National Forest was estimated Saturday to have burned 125 acres in two drainages in the East Pioneer Mountains. The Hidden Lake Fire, 30 miles northwest of Dillon, started Friday in Grasshopper Valley, an area of widely scattered homes, ranches and businesses. Crews from the Dillon and Grasshopper fire departments were guarding houses and other buildings.

Ten fire engines and 60 firefighters were fighting the fire.

In northwestern Montana, the Wedge Canyon Fire swelled from 75 acres to 350 acres overnight. Lightning started it eight miles west of Glacier National Park and 10 miles south of the Canadian border, in the North Fork drainage of the Flathead River.

A special team of expert fire managers from local, state and national agencies was called in to manage the fire because of its threat to expand. It was the second such "Type 2" team to be called to action in Montana in two days. The other was working on a cluster of three fires on or near the C.M. Russell Wildlife Refuge in eastern Montana.

Three fire engines and three helicopters and 35 firefighters were assigned to the Wedge Canyon Fire Saturday. Two more 20-member hand crews were on their way.

Officials said about 25 buildings were in front of the fire in the Trail Creek and Tepee Lake areas. Fire engines and crews from several Flathead Valley fire departments were sent Friday to protect cabins in the Tepee Lake area.

Montana's biggest fire, the Mickey Butte Fire on the C.M. Russell Wildlife Refuge, grew about 500 acres to 3,600 acres on Saturday. It's north of Fort Peck Lake, about 50 miles south of Malta.

Mike Granger, fire management officer for the refuge, said the 75 firefighters were being aided by air tankers and a helicopter.

The firefighters' strategy was to burn out areas between the fire and natural barriers so the fire would be funneled toward the lake, Granger said.

The cluster of three big fires in eastern Montana had burned some 5,000 acres by Saturday.

The Big Coulee Fire, 30 miles northwest of Jordan, covered 1,900 acres and was threatening seven ranch houses. The Germaine Fire, just south of the CMR refuge and east of the Musselshell River, covered about 1,000 acres. And the Ghost Coulee Fire, entirely on the refuge, grew from about 600 acres on Friday to 1,500 acres on Saturday.