Hundreds of the top mountain bikers from across the country will venture to California’s Mammoth Mountain this summer for the 2015 USA Cycling Mountain Bike National Championships. From July 15-19, athletes from ages 6 and up will compete for national titles in cross-country, short track cross-country, downhill, dual slalom and the new addition of Enduro. This mammoth event will provide an epic setting to earn the Stars-and-Stripes jersey this summer.