Traprock 50
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Event overview
The Connecticut Traprock 17 & 50k Ultramarathon is a trail running event that offers two distances: 17 km and 50 km. The race is scheduled for the Saturday before the Boston Marathon; the organizer listed the 2026 race day as Saturday, April 18, 2026. Organizers also announced that registration opens on Thanksgiving Day.
Course and history
Past editions and related training runs have been held at Penwood State Park in Bloomfield, Connecticut. The event page lists multiple past training runs and course previews at that park, and the organizer presents the race as a recurring community event. Visit the organization's website for the most recent information.