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IronHike Endurance Series

Cornwall, United States • 2-5 Oct 2025

IronHike Endurance Series brings a mountain-style challenge to Mohawk Mountain Ski Area in Cornwall, Connecticut. The Fall 2025 edition runs across October 2–5 and offers six self-paced events ranging from 12 to 84 hours. Core distances include Olympus Mons Ultra (152+ miles, about 72,590 ft of elevation) and Everest (61+ miles, 29,155 ft), plus Denali (43+ miles, 20,825 ft) and shorter routes like Kuwohi (15 miles, 7,140 ft) and Double Kuwohi (28+ miles, 13,685 ft). Participants can compete solo, with a trail buddy, or as a trail family, using FlexRelay pacing. The format emphasizes personal endurance, tents and spectator areas, ski-patrol safety, and a community journey rather than podiums or records. 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
50400 m+
Answer the Bell Ultra - Full - 100+ Miles | 50,400' Elevation | 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
29 mi
14400 m+
Answer the Bell Ultra - Basic - 28.8 Miles | 14,400' Elevation | 24 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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