Sunday’s Superfrog triathlon is normally a unique event because of its ties to naval commando history and its long presence in the sport—this is the 33rd anniversary of the race, originally created to train Navy SEALs and serve as a warm-up to the Ironman World Championship.

Sunday’s Superfrog triathlon is normally a unique event because of its ties to naval commando history and its long presence in the sport—this is the 33rd anniversary of the race, originally created to train Navy SEALs and serve as a warm-up to the Ironman World Championship.

But this year it takes on an even more special meaning because of the recent loss of 71 warriors in the SEAL community and the 10-year anniversary of 9/11. Proceeds from the race will go to the Navy SEAL Foundation, which benefits the families of fallen SEALs. Tribute banners for fallen SEALs have already raised $30,000.

The Imperial Beach, Calif. course “is not for the faint of heart,” according to the website. It starts with a two-loop 1.2-mile cold and potentially choppy ocean swim, moves on to a flat and fast 56-mile bike and finishes with a 13.1-mile run course that goes two loops through roads, trails, hard-packed sand a bit of soft sand as well. (Race director Mitch Hall said they changed the course slightly from last year to be less on soft sand, but kept some miles there for tradition’s sake.)

Watch out for a naval parachute demo team and a piece of one of the World Trade Center towers on display at the event.

The Superfrog team also puts on Superseal and the Seal Sprint in March.