400

Trail #400 is one of the most unique dirt bike trails in the Danskin Trail System in the Boise National Forest, as it parallels a creek with 20+ river crossings, riding through wild wooded terrain. From the north end, it starts at the intersection with #421 on a shelfy side hill under some pine tree...

When to go: Summer and Fall typically offer the best window.

Vehicles: ATV, Dirt Bike, Jeep/Truck. Standard offroad prep applies: appropriate tires, ground clearance, and a basic recovery kit.

Southwest Idaho context

Southwest Idaho splits across the Snake River. South of the river is Owyhee high desert — sage flats, slickrock canyons, and a million-plus acres of BLM. North is the Boise National Forest, with mining-era roads, ponderosa, and quick out-of-Boise access. Most weekend trips work off Boise, Mountain Home, Marsing, or McCall.

Best for drivers who understand their vehicle and the cost of a mistake in remote country.