The historic Magruder Road Corridor is closed for at least a month in Idaho, according to forest officials.

Road crews are stabilizing the wilderness road between Kim Creek Saddle and Magruder Crossing, according to a news release from Tod McKay of the Bitterroot National Forest.

The section of road was in danger of washing out during high runoff and crews are using bulldozers, dump trucks, a road grader and other heavy equipment to make the road safe.

The Magruder Road is open on the Montana side to Paradise Campground, but is closed beyond that. On the Idaho side, the closure signs have been posted near Elk City.

The 100-mile road was constructed in the 1930s between the Selway-Bitterroot and the Frank Church-River of No Return Wildnerness areas. The Civilian Conservation Corps built the rough, winding road to connect Idaho with Montana. When the snow melts, the road is open annually, but there are no services for 120 miles. Forest advisories say it takes about 10 hours to drive between Red River and Darby on the Magruder Road.

A map of the closure area is at the Bitterroot National Forest website.

Examining the Magruder Road. (Bitterroot National Forest photo, Townsquare Media)