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IronHike Endurance Series

Cornwall, United States • 2-5 Oct 2025

The IronHike Endurance Series, held at Mohawk Mountain Ski Area in Cornwall, Connecticut, is a multi-day endurance event featuring rugged, scenic courses designed to challenge participants with significant elevation gains. Spanning from October 2 to 5, 2025, the series offers various timed events ranging from 12 to 84 hours, including distances from 15 miles (Kuwohi) up to 152+ miles (Olympus Mons Ultra). Participants can compete solo or in teams of two to four in a FlexRelay format, managing their own pacing, hydration, and rest. The event emphasizes personal transformation over competition, providing exclusive access, support stations, tenting, medical aid, and a supportive community atmosphere. Visit the organization's website for the most recent information.

United States Connecticut Cornwall

Race information

Registration
152 mi
72590 m+
Olympus Mons Ultra - 152+ Miles | 72,590' Elevation | 84-Hour
100 mi
Ironhike Answer the Bell Ultra - 100+ Miles | 84-Hour
61 mi
29155 m+
Everest - 61+ Miles | 29,155' Elevation | 72-Hour
43 mi
20825 m+
Denali - 43+ Miles | 20,825' Elevation | 48-Hour
28 mi
13685 m+
Double Kuwohi - 28+ Miles | 13,685' Elevation | 24-Hour
15 mi
7140 m+
Kuwohi - 15 Miles | 7,140' Elevation | 12-Hour
Visit the organization's website for the most recent information.
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