ÖTILLÖ Casco Bay USA

AUG
9
2026
A swimrun across the islands of Casco Bay near Portland, Maine, with ocean swims, island runs, and three race distances. Athletes travel to start lines by ferry and must carry mandatory swimrun gear.
Sun 9 Aug 2026
Casco Bay Experience (run... Casco Bay Sprint (run) Casco Bay World Series (r...

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ÖTILLÖ Casco Bay USA : Swimrun on the islands off Portland, Maine

ÖTILLÖ Casco Bay USA is a swimrun event held among the islands off Portland, Maine. The event features ocean swims, multiple island run segments, rock scrambles, and tidal conditions across a mapped course that finishes at Peaks Island Lion’s Club.

There are three race distances:

  • Casco Bay Experience: total 9 705 m, swim 1 635 m, run 8 070 m
  • Casco Bay Sprint: total 16 930 m, swim 3 230 m, run 13 700 m
  • Casco Bay World Series: total 35 165 m, swim 7 940 m, run 27 225 m

Athletes and registered volunteers are transported to start lines by Casco Bay Lines ferries and receive ferry tickets; spectators must arrange their own transport. The event provides packet pickup at Holiday Inn Portland-by the Bay the day before the race, with a race morning pickup option on a limited basis. Bag drop is available before boarding ferries and will be moved to the finish area.

Mandatory race gear includes event swim caps, bibs, timing chips, and for solo racers a Restube. Athletes must provide shoes, a wetsuit, a whistle, a compression bandage, and a tether. The course has safety cut-offs at specific islands and permanent restroom facilities are available on course. Post race food and drink are provided for finishers near the finish area. Visit the organization's website for the most recent information.

27 km
Casco Bay World Series (run)
14 km
Casco Bay Sprint (run)
8 km
Casco Bay Experience (run)
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