IronHike Endurance Series
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About the race
IronHike Mohawk Mountain Fall Series is a vertical trail endurance event held October 1–4, 2026 at Mohawk Mountain Ski Area in Cornwall, Connecticut, USA. The series uses looped laps on the Mohawk Mountain Trail with substantial elevation gain and loss; courses are described as having no flat areas, "all up and all down." Events are offered as timed efforts with lap counts and total elevation targets. Entrants can compete as individuals or in team relays.
Team options are Trail Buddy (teams of 2) and Trail Family (teams of 3 or 4) using a FlexRelay format: the team manages how many laps each member completes, there are no minimum or maximum laps per person, one person initially pays the team fee, and each individual must register after the team registration to sign the event waiver. Available durations and representative event details include: - Kuwohi - 12-hour event, 12 laps, 7,140 feet elevation gain and loss. - Double Kuwohi - 24-hour event, 23 laps, 13,685 feet elevation gain and loss. - Denali - 48-hour event, 35 laps, 20,825 feet elevation gain and loss. - Everest - 72-hour event, 49 laps, 29,155 feet elevation gain and loss. - Olympus Mons Ultra - 84-hour event, 122 laps, 72,590 feet elevation gain and loss. Separate Answer the Bell formats require repeating 1.2 mile efforts with 600 feet of elevation gain and loss each hour; one format runs for 24 hours, another can run up to 84 hours and is described as totaling more than 100 miles and over 50,000 feet of vertical gain. Visit the organization's website for the most recent information.
