ÖTILLÖ Casco Bay USA

AUG
9
2026
Explore Casco Bay by swimrun across islands, tide affected ocean swims and rocky runs with ferry starts and a lively finish on Peaks Island. Choose from sprint to World Series distances for a seaside adventure tested by tide and terrain.
Sun 9 Aug 2026
Casco Bay Experience Casco Bay Sprint Casco Bay World Series

Always double-check with the organizer's website! This page may contain affiliate links.

Event overview

ÖTILLÖ Casco Bay USA is a swimrun event held in the Casco Bay islands off Portland, Maine. The course uses multiple islands, ocean swims, tide-affected passages, and rocky running terrain. Athletes and volunteers are transported to start islands by Casco Bay Lines ferries; those tickets are included for athletes and volunteers. Spectators must arrange their own island transport. The finish and post-race area is on Peaks Island.

Courses and distances

There are three race distances:

  • Casco Bay Experience : Total 9,705 m (Swim 1,635 m, Run 8,070 m, Elev 45 m)
  • Casco Bay Sprint : Total 16,930 m (Swim 3,230 m, Run 13,700 m, Elev 107 m)
  • Casco Bay World Series : Total 35,165 m (Swim 7,940 m, Run 27,225 m, Elev 262 m)

Logistics, safety, and rules

Packet pickup is mandatory the day before at Holiday Inn Portland-by the Bay; one person may collect a team packet with permission and ID. Bag drop is available before boarding the ferry; athletes are advised not to include valuables. The event uses safety cut-offs at key exits on the course to manage daylight and safety. Mandatory race-provided items include a colour-coded swim cap, bib, timing chip, and Restube for solo racers. Mandatory athlete-provided gear includes shoes to be worn throughout, a wetsuit, a whistle, a compression bandage, and a tether. Teams must stay together and follow the marked course; littering and missing mandatory gear can lead to disqualification. Post-race food and drink are available near the finish. Visit the organization's website for the most recent information.

35 km
Casco Bay World Series
16 km
Casco Bay Sprint
9 km
Casco Bay Experience

Events nearby

Join the Sebago Lake Triathlon in Standish, ME on June 28, 2026, with Olympic, Sprint, aquabike, duathlon, relay and virtual options for athletes 13 and up. Scenic lake swims, trail runs and chip timing make it a top summer challenge.
Experience the thrill of OTILLO Swimrun across Casco Bay Islands near Long Island, Maine on August 9, 2026. Swim and run scenic coastal terrain with options for World Series, sprint and experience distances and spectator boats.