The 2023 Sea to Summit Triathlon
Saturday, July 22, 2023

The Sea to Summit is not your traditional multisport race. This is an amazing day which combines the core elements of triathlon with the challenges of an adventure race. With assistance from your support designate, or porter, you’ll swim 1.2 miles, ride 95 miles then run and climb your way up the tallest mountain in the Northeastern United States. Serious athletes only need apply.

Sea to Summit Triathlon Map — Kennebunk, Maine to Mt. Washington
voted one of the world's top 5 ``bucket list`` races
triathlete's choice awards
Race Details

Course Maps



Male athlete runs near Wildcat Mountain sign during Sea 2 Summit Triathlon
Qualification Standards

This is not a race for beginners. Required for entry into Sea to Summit is the completion of a non-abbreviated 140.6 (“Ironman”) triathlon in 13:49 or less, or a 70.3 distance triathlon in 6:19 or less. These qualifying events must have been completed after Jan. 1, 2018. Prior Sea to Summit racers who finished within the race’s time limits are pre-qualified. The race directors do (rarely) allow entries for athletes who have completed other recent races of similar difficulty if they are convinced the athlete likely has the ability to reach the checkpoints before the cut-off times (see the Race Details page). But you must contact us beforehand! Athletes must be 18 years of age or older.


Qualifications standards for relay teams are different from individual requirements. See the registration page for details.


A cold-water coastal swim is a serious challenge. Water temperature may range from 56 to 62 degrees. For that reason, a swim qualification is required — in addition to the overall qualification. Your swim time in a USAT or Ironman sanctioned event after January, 2018 must have been 1:29 or less for a 140.6, :44 or less for a 70.3, or :34 or less for an Olympic distance triathlon. Required of individual racers and relay team (swimmer).

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