High Five 100 - Lake City, CO

The High Five 100 is an extreme ultra-endurance running challenge held in Lake City, Colorado. Covering approximately 90 to 105 miles with over 40,000 feet of elevation gain, the course requires runners to summit five 14,000-foot peaks and six 13,000-foot peaks within 48 hours. Unlike traditional races, the route is not marked, and participants must navigate to 24 specified proof points and checkpoints in order, choosing their own paths between them.

Aid is only allowed at checkpoints, and there are no aid stations or entry fees. This grueling event tests mental toughness and physical endurance across rugged San Juan Mountains terrain, attracting only highly experienced mountain ultra runners. Visit the organization's website for the most recent information.