Double Dirty Dozen 12 Hours

Mountains to Sea Challenge	50K
Zion Ultras and Trail Half Marathon	50K
Peterson Ridge Rumble	40M
Kal-Haven	33.5M
Gorge Waterfalls	50K
Napa Valley 50k	50K
James River Trail Runs	50M
Fall Creek Falls 50K	50K
TNT - Toughest N' Texas Trail Runs	50K
SPASM Lake Chabot Trail Run	50K
Ouachita Trail	50M
Ouachita Trail	50K
Lake McMurtry Run	100K
Lake McMurtry Run	50K
New River Trail Races	50K
Gorge Waterfalls	100K
Traprock 50	50K
James River Trail Runs	50K
Serengeti Trail Races	50K
Serengeti Trail Races	50M

Double Dirty Dozen 12 Hours Course Charts