Embark on an inspiring winter challenge at Running Up for Air - Mt Sentinel, returning to Missoula, MT, on February 7, 2026. This unique endurance event invites runners and hikers to tackle laps up the iconic Mt. Sentinel, not just for personal achievement, but to champion cleaner air and local climate solutions. Choose your challenge from 3-hour, 6-hour, 12-hour, or the demanding 24-hour race options, all contributing to Climate Smart Missoula's vital work in the community.

The course itself offers a formidable yet rewarding experience, beginning at the M-Trail parking lot. Each approximately 4-mile lap ascends the switchbacks to the "M" before climbing the steep Northwest Ridge Trail to Mt. Sentinel's 5,158-foot summit, then descending via the Boy Scout Trail back to the base. Expect roughly 1,900 feet of elevation gain per lap, with terrain that is often muddy, icy, or snow-covered in February, requiring mandatory traction devices. Typical race day conditions in early February often see highs around 34°F and lows around 20°F, with a low chance of precipitation, ensuring a true test of winter grit. A small aid station awaits at the summit, and participants can also access a base aid station.

Running Up for Air – Mt Sentinel is renowned for its supportive atmosphere, where participants cheer each other on while making a tangible difference for air quality. This staple winter event in Missoula fosters a strong sense of community, transforming your physical effort into impactful fundraising for a healthier environment.