Gravity Assisted Mountain Biking is the original inventor of the "World s Most Dangerous Road" (also known as the "Death Road") ride in Bolivia, as well as pioneer in many other great downhill mountain bike rides around Bolivia. We offer rides in Bolivia from one-day to two-weeks long, as well as multi-activity trips that include biking, hiking, mountaineering and much more. We recently opened in Cusco, Peru to offer many more incredible downhill mountain bike rides for all levels of riders.