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| Event | Distance | When | Entry fee | Cap |
|---|---|---|---|---|
| World Series Solo | AquathlonOpen water swim | Aug 8, 20276:00 AM | $375$390 after Nov 20, 2026 | – |
| World Series Team | AquathlonRelay or teamOpen water swim | Aug 8, 20276:00 AM | $590$645 after Nov 20, 2026 | – |
| Experience Solo | AquathlonOpen water swim | Aug 8, 20277:00 AM | $215$240 after Nov 20, 2026 | – |
| Experience Team | AquathlonRelay or teamOpen water swim | Aug 8, 20277:00 AM | $375$390 after Nov 20, 2026 | – |
| Spectator Boat Ticket - Adults & Teens | – | Aug 8, 20277:00 AM | $75 | 36 |
| Spectator Boat Ticket - Kids 12 & Under | Kids | Aug 8, 20277:00 AM | $45 | 10 |
| Sprint Solo | AquathlonOpen water swim | Aug 8, 20278:00 AM | $215$240 after Nov 20, 2026 | – |
| Sprint Team | AquathlonRelay or teamOpen water swim | Aug 8, 20278:00 AM | $375$390 after Nov 20, 2026 | – |
Entry fees exclude processing fees. Prices and dates come from the race's registration page and refresh nightly.
The Aquathlon fee goes up to $240 on Nov 20, 2026.
Around August 8, the water at NOAA's Portland station typically runs about 62°F (59 to 65°F across 2016 to 2025). Wetsuits were legal every year at this date.
Measured by the NOAA tide station nearest the race's listed location, about 7.9 km away; open beaches and sheltered bays nearby can differ by a few degrees. Wetsuit cutoffs are USA Triathlon age-group rules. The race's own water temperature reading on race morning decides.
Online registration closes Aug 8, 2027, unless the race fills first.
Sunrise on race morning is at about 5:36 AM, and the World Series Solo starts at 6:00 AM. The start sits about 70 feet above sea level.
Fees exclude processing fees. Comparisons use current entry fees and published results from races nearby.
Downtown, Long Island, ME 04050
The pin marks the address the race lists, which is usually the start. The organizers have not shared a course map with us yet.
Aggregated from official results (Negative Split Timing & Results) for OTILLO Swimrun Casco Bay Islands. Individual finisher names are not stored here.
At the 2025 Sprint Solo, the fastest tenth finished in 2:09:00 or better, the top quarter in 2:26:18, and half the field in 2:40:19; the last tenth came in after 3:16:53.
At the 2025 Sprint Team, the fastest tenth finished in 2:13:56 or better, the top quarter in 2:25:34, and half the field in 2:35:14; the last tenth came in after 3:36:02.
At the 2025 World Series Team, the fastest tenth finished in 4:53:29 or better, the top quarter in 5:13:56, and half the field in 5:43:37; the last tenth came in after 6:25:56.
| Age | Women | Men |
|---|---|---|
| 20-29 | n/a | 2:04:51 |
| 30-39 | 2:29:33 | 1:58:44 |
| 40-49 | 2:29:23 | 2:09:05 |
| 50-59 | 2:39:59 | 2:27:39 |
| 60-69 | 2:33:02 | 2:58:38 |
Groups with fewer than five finishers are left out. Awards vary by race; check the race's rules.
Where a finish time would have placed in 2025.
Around August 8 the day usually runs from 63°F at dawn to 80°F in the afternoon, with measurable rain on about 25% of days. Cold snaps dip to 59°F and hot years reach 87°F.
Based on 75 days within a week of the date over the last 5 years, from historical weather for the start area. Not a forecast.
What the organizers of OTILLO Swimrun Casco Bay Islands cover on their registration page, in brief.
The cause
A husband, a father, a sportsman, an event organizer and a leader, Jeff Cole cared deeply about each and every person he had contact with. He grew up on the water and worked as a lifeguard and was a volunteer fireman at the Kennebunk Fire…
Organize this race? Add details or a correction
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