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The Blue 2 Blue Challenge

West Rock, United States • 4 May 2025

The Blue 2 Blue Challenge is a demanding 50K trail race held in New Haven, Connecticut, known as the state's hardest 50K, covering approximately 33 miles of technical terrain. The out-and-back course starts at West Rock Playground and features rugged trails including the Regicides and Quinnipiac Blue-Blazed Trails, with about 6,350 feet of climbing. Runners navigate rocky, challenging paths, summiting Mt.

Sanford and passing notable landmarks like Roaring Brook Park. The race has a strict 10-hour cutoff, no pacers or crews allowed, and multiple aid stations along the route. It requires prior trail 50K experience, emphasizing a tough, graduate-level challenge for seasoned runners. Visit the organization's website for the most recent information.

United States Connecticut West Rock

Race information

Registration
50 km
6350 m+
50k
Visit the organization's website for the most recent information.
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