Run Across CT
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CT123 (200K) : April 4, 2026
The CT123 is a point-to-point ultramarathon covering 123.2 miles across Connecticut, starting in East Thompson and finishing at the Wakeman Boy's and Girls Club in Southport. The route passes through 25 towns and mixes trails and roads: roughly 57 miles are on well-maintained trails with occasional stream crossings and varied footing, while the remainder follows backroads and local highways. Total elevation change is approximately +3,842 ft ascent and -4,455 ft descent.
Distances and finish awards
- Solo 200k
- Solo 100k
- 6-person 200K relay
- 3-person 200K relay
Finishers of the 200K receive a belt buckle. Finishers of the 100K and 200K relay options receive a standard medal. All finishers receive a 2025 CT123 t-shirt and additional race swag.
Support, cutoffs, and logistics
Aid stations staffed by volunteers provide hydrating drinks, electrolyte replenishment, and light snacks. Medical staff are present for common ultramarathon issues. There are five intermediate cutoffs plus a final cutoff at the finish; the intermediate cutoff locations and mileages are: Aid Station 3 (The Chronicle) : 32.5 miles; Aid Station 5 (Eaton Lot) : 55.8 miles; Aid Station 6 (The Rec Plex) : 63.8 miles; Aid Station 7 (Morgan Materials Lot) : 75.9 miles; Aid Station 10 (Sandy Point) : 100.07 miles. Crew access is available at those aid stations. Runners are expected to maintain about a 17.5 min/mi pace (3.5 mph) to remain ahead of cutoffs.
Practical notes: the event is no-refund, rollovers are allowed upon request, field size is limited, and there are no shuttle services. Participants should prepare for variable spring weather and arrange their own transport or crew support. Visit the organization's website for the most recent information.
