John Stamstad is a member of the Mountain Bike Hall of Fame.
The 547-mile (880 km) non-stop race was across Missouri from St. Louis to Kansas City and back.
Stamstad has moved on to distance running in recent years, serving as a sponsored "ambassador" for Patagonia, the outdoor clothing and equipment manufacturer.
He has spent his time running self-supported across some of the world's most desolate terrain.
On a 100-mile (160 km) desert run, on the White Rim Road in Canyonlands National Park, Stamstad ran with a modified baby jogger full of water .