USA
DifficultKellner Canyon Road — Bighorn Mountains Desert Floor to Cloud Peak Wilderness Edge
Bighorn's east wall, no guardrails.
Feature: High Altitude
Colorado
ModerateRollins Pass (Moffat Road) — East & West Approaches
Moffat's ghost road over the Divide.
Colorado
ModerateTaylor Park to Tin Cup Pass — Gunnison High Country Road
Ghost towns and 12K feet of Colorado sky.
USA
ModerateBeartooth Highway Backcountry — Index Peak to Clay Butte Overlook
Above timberline with grizzlies and zero guardrails.
Colorado
DifficultOphir Pass Road — Silverton to Telluride via the Uncompahgre Plateau
Loose shale, 13,114 feet, zero margin.
Idaho
ExpertMagruder Corridor Road — Red River to Darby via the Selway-Bitterroot Divide
Wildest road in the lower 48. Full stop.
Nevada
ModerateLonesome Highway — Toiyabe Crest to Big Smoky Valley via Arc Dome Wilderness
Nevada's forgotten spine, 10K feet of silence.
Colorado
DifficultMedano Pass Primitive Road — Great Sand Dunes to Wet Mountain Valley
Sand, creek crossings, and a Sangre de Cristo crossing.
California
ModerateMineral King Road — Sequoia National Park’s Switchback Gauntlet
698 curves into the Sierra's most remote valley.
Colorado
ExtremeBlack Bear Pass Road — Silverton to Telluride via the Jaw-Dropper
Colorado's most notorious shelf road. One way down.