Ironhike Endurance Series - Spring

Event Overview

The IronHike Endurance Series - Spring is a multi-day trail endurance event taking place from June 4 to 7, 2026 at Mohawk Mountain Ski Area in Cornwall, Connecticut. It features a FlexRelay format where participants can tackle events solo or in teams of 2-4 people. The location is approximately 1.5 hours from New York City and Boston.

Distances and Formats

The event offers several endurance challenges with varying distances, elevation gain, and time limits. Participants choose a "summit" to attempt.

• Kuwohi: 12-hour event, covering 15 miles and 7,140 feet of elevation.
• Double Kuwohi: 24-hour event, covering 28+ miles and 13,685 feet of elevation.
• Denali: 48-hour event, covering 43+ miles and 20,825 feet of elevation.
• Everest: 72-hour event, covering 61+ miles and 29,155 feet of elevation.
• Olympus Mons Ultra: 84-hour event, covering 152+ miles and 72,590 feet of elevation.
• Answer the Bell Ultra: Available in 24-hour (Basic) and 84-hour (Full) formats, featuring a repeated loop of 1.2 miles with 600 feet of elevation gain each hour.

Event Details

The format is not a traditional race with a podium; it is described as a personal journey. Participants self-manage their pace, rest, and nutrition to accumulate the required elevation within the time limit. Headlamps are mandatory for night trekking. Registration includes a tenting space for participants and spectators, event bibs, a finisher's medal, and access to a base area support station. Visit the organization's website for the most recent information.