IronHike Endurance Series
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Event overview
The IronHike Endurance Series takes place in Cornwall, Connecticut, at Mohawk Mountain Ski Area from October 2 to October 5, 2025. The series is organized by IronHike Endurance Productions LLC, a US military veteran-owned business. Events use a FlexRelay format that allows solo entries or teams: Individual (solo), Trail Buddy (team of 2), or Trail Family (team of 3 or 4). Participants self-manage pacing, rest, hydration, and sleep. Some events require night trekking by headlamp. The series states it is not a race: there are no podiums, no records, and no age group awards.
Distances and included services
- Kuwohi - 15 miles, 7,140' elevation, 12-hour
- Double Kuwohi - 28+ miles, 13,685' elevation, 24-hour
- Denali - 43+ miles, 20,825' elevation, 48-hour
- Everest - 61+ miles, 29,155' elevation, 72-hour
- Olympus Mons Ultra - 152+ miles, 72,590' elevation, 84-hour
- Answer the Bell Ultra - Full - 100+ miles, 50,400' elevation, 84-hour
- Answer the Bell Ultra - Basic - 28.8 miles, 14,400' elevation, 24-hour
Registration includes tenting space for participants and up to six spectators at no extra charge, base area pop-up staging and support station, custom training plans by Chaski Endurance Collective, personalized bibs and finisher items, ski patrol medical support, and free parking and restrooms. Visit the organization's website for the most recent information.