Sea to Summit Triathlon 2027
- Date
- Saturday, July 31, 2027
- Start time
- 5:30 AM start (New York)
- Location
- South Berwick, Maine
- Entry fee
- From $525
- Included with entry
- Includes a shirt
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Events and entry fees
| Event | Distance | When | Entry fee | Cap |
|---|---|---|---|---|
| Sea to Summit Triathlon | TriathlonSwim 1.2 mi · Bike 95 mi · Run 5.5 miOpen water swim | Jul 31, 20275:30 AM | $525 | – |
| Sea to Summit Triathlon Relay Team | TriathlonSwim 1.2 mi · Bike 95 mi · Run 5.5 miRelay or teamOpen water swim | Jul 31, 20275:30 AM | $690 | – |
Entry fees exclude processing fees. Prices and dates come from the race's registration page and refresh nightly.
The swim at Sea to Summit Triathlon
This is an open water swim at Knights Pond. The organizer's wetsuit note: wetsuits allowed; optional if water reaches 78 F.
From the organizer's own race information (source). Venues and rules can change from year to year; the race's current athlete guide decides.
Water temperature and wetsuits at Sea to Summit Triathlon
Around July 31, Knights Pond typically runs about 80°F at the surface (77 to 83°F across 2011 to 2020). The water usually runs above 78°F at this date: wetsuits are allowed but make you ineligible for age-group awards.
A model estimate from the USGS lake temperature model (daily surface temperatures for US lakes), not a measurement. Wetsuit cutoffs are USA Triathlon age-group rules. The race's own water temperature reading on race morning decides.
Race day planning
Entry fee schedule
- Sea to Summit Triathlon: $525 until Jul 7.
- Sea to Summit Triathlon Relay Team: $690 until Jul 7.
Online registration closes Jul 7, 2027, unless the race fills first.
Light and altitude
Sunrise on race morning is at about 5:31 AM, and the Sea to Summit Triathlon starts at 5:30 AM. The start sits about 130 feet above sea level.
Fees exclude processing fees. Comparisons use current entry fees and published results from races nearby.
Start location and course
South Berwick, ME (start), South Berwick, ME 03908
The pin marks the address the race lists, which is usually the start. The organizers have not shared a course map with us yet.
Typical race-day weather
Around July 31 the day usually runs from 62°F at dawn to 83°F in the afternoon, with measurable rain on about 32% of days. Cold snaps dip to 56°F and hot years reach 92°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.
Race details
- Where
- South Berwick, ME (start), South Berwick, ME 03908Map
- Course
- Road
- Start elevation
- About 130 feet
- Included with entry
- T-Shirt
- Distances
- Triathlon
- Editions
- 2027 (Jul 31, 2027), 2026 (Jul 25, 2026), 2021 (Jul 31, 2021), 2020 (Jul 25, 2020), 2019 (Jul 27, 2019), 2018 (Jul 28, 2018)
Organize this race? Add details or a correction
Quick answers
- When is Sea to Summit Triathlon?
- Saturday, July 31, 2027, starting at 5:30 AM.
- How much does it cost?
- Entry starts at $525 before processing fees.
- When does registration close?
- Online registration closes Jul 7, 2027, unless the race fills first.
- Do athletes get a shirt or medal?
- Entry includes a shirt, according to the race's registration page. Check it for sizes and whether kids' races get the same.
- What distances are offered?
- Triathlon.
- Where does it start?
- South Berwick, ME (start), South Berwick, ME 03908.
From the organizers
Sea to Summit is not your traditional triathlon. This is an amazing day: combining the elements of a long-distance triathlon with the challenges of an adventure race. This largely self-supported event consists of a 1.2-mile swim, a 95-mile bike ride, and a strenuous 5.5-mile run/climb up the tallest mountain in the Northeast U.S. The 2027 race starts at 5:30 am, Saturday July 25 in the coastal village of South Berwick, Maine and ends atop Mt. Washington within the White Mountains of New Hampshire. You'll be ready for that post-race dinner!
Qualifications:
We must place strict qualification restrictions to be sure all athletes finish safely during daylight.
For age group athletes, required is the completion of either: