In Denver's backyard is one of the most scenic and challenging off-road triathlons out there. Swing up to the XTERRA Indian Peaks Triathlon on July 28 at the Eldora Mountain Resort. After a chlly 1000m swim in Lake Peterson and a 600m run up to transition you'll embark on the tough but doable two loop 23km bike course. Once you're done slinging through the mud, the epic 7km run that includes double track, single track and even some faint track. At the end are finisher prizes, food trucks, live music and free beer. What more could you ask for a 9200'.