Run Across CT

APR
10
2027
A point to point 123 mile ultramarathon across Connecticut from East Thompson to Southport with trails, roads, aid stations, and a 36 hour cutoff.
Sat 10 Apr 2027
200 kilometers 100 kilometers

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Run Across CT 123

Run Across CT 123 is a point-to-point ultramarathon across Connecticut covering 123 miles. The course starts in East Thompson and finishes at the Wakeman Boy's and Girls Club in Southport, passing through 25 towns and a mix of trail and road surfaces. Approximately 57 miles are on well-maintained trails; the remainder follows scenic backroads, bike paths, and local highways. Total ascent is about 4,000 ft and total descent about 4,500 ft.

Distances offered:

  • Solo 200k
  • 200k relay, 6-person teams
  • 200k relay, 3-person teams
  • Solo 100k

The event has a 36 hour cutoff and five intermediate cutoffs plus a finish cutoff; runners must average roughly 17.5 minutes per mile (3.5 mph) to meet cutoff times. Aid stations are placed along the route and provide fluids, electrolytes, and light snacks; volunteers staff aid stations and respond to common ultramarathon issues. Crew access is permitted at aid stations only, except in medical emergencies.

Expected conditions include variable spring weather; runners are advised to prepare layered clothing, packable rain protection, and backup gear. Nearby lodging is available around the start area in Putnam, CT. Volunteers staff aid stations, mark the course, and manage checkpoints; volunteers receive race credit, swag, and food. Visit the organization's website for the most recent information.

200 km
6-Per. 200k Relay
200 km
3-Per. 200k Relay
200 km
Solo 200k
100 km
Solo 100k

Events nearby

A community fundraiser in Pomfret Center with a trail 5K and a 0.5 mile kids run supporting the Pomfret Community School PTO. Early and later registration fees differ and awards plus finisher medals are given.
Trail races on the restored Moosup Valley State Park Trail in Sterling CT with 5K, 8K, 10K and a kids fun run plus postrace food and shirt or medallion options.
A 5K trail race and 5K walk through Lake Street Park trails, plus a Kid Run on the lacrosse field for age 12 and under.
A 26.4 mile trail marathon in Ashford CT on October 4, 2026 with a two person relay option and a course of rocks, roots, mud, and wood bridges.
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