Trinity Ridge Road

When turning onto Trinity Ridge Road from the south, one should note the sign that says passenger cars and trailers are not recommended. The first few miles are the typical low-maintenance dirt and gravel forest road. As the climb up to the pass on the shoulder of Trinity Mountain starts, the road degrades with washouts, ruts, rocks, and switchbacks. The Hardest Part photo does not do that section...

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

Vehicles: Jeep/Truck, SUV. Standard maintenance and a spare tire cover the basics here.

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.