Running Up for Air Mt Sentinel
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Event details
Running Up for Air | Mt Sentinel is scheduled for Friday February 6 to Saturday February 7, 2026 in Missoula, Montana. The event is based at Phyllis Washington Park and centers on Mt. Sentinel, which has an elevation of 5,158 feet. The event offers the following timed options:
- 24 hr
- 12 hr
- 6 hr
- 3 hr
Entry fees listed on the event page are $175 for the 24-hour event, $125 for the 12-hour event, $100 for the 6-hour event, and $75 for the 3-hour event. Prices increase after December 31, 2025.
Purpose, format and safety
The event is a winter endurance challenge in which participants run or hike repeated laps to summit Mt. Sentinel as many times as possible. Each registration creates a fundraising page; participants are encouraged to gather pledges tied to laps completed. All proceeds go to Climate Smart Missoula to support local air quality and climate initiatives.
Organizers note specific winter safety procedures. The race may be canceled, delayed, or shortened if conditions are deemed unsafe for participants or volunteers. Possible triggers for such decisions include temperatures below zero, windchill below -10, impaired visibility from snow, or hazardous course conditions. The event is part of the Up For Air Series. Visit the organization's website for the most recent information.
