South Dakota
Difficult
Centennial Trail – Black Hills Section
Cross the entire Black Hills backcountry
Difficulty: Difficult
Level 3
South Dakota
Difficult
White River Badlands Fossil Loop
Ancient sea beds and fossil hunting
South Dakota
Difficult
Missouri River Breaks Buffalo Gap Trail
Lewis and Clark's nightmare, modern 4x4ers' challenge
California
Difficult
Sidewinder Trail
Technical granite crawling minus the tourist hordes
California
Difficult
Black Canyon Road
Slot canyon adventure in the Anza-Borrego
California
Difficult
Buttercup Valley Road
Joshua Tree's gnarliest rock gardens
California
Difficult
Chariot Canyon Road
Ancient canyon route through desert slots
California
Difficult
Pinkham Canyon Road
Slot canyon technical challenge with mining history
California
Difficult
Burns Canyon Road
Granite canyon technical challenge near Big Bear
California
Difficult
Pioneertown Mountains Preserve Road
Desert to mountains traverse through granite maze.