This swim is a 2-loop course from the South Bay swim beach. The course starts in the water by the beach/swim ramp, does a triangular course twice, finishing out of the water, on the beach/swim ramp.

There are 2 divisions:  Wet suit and non-wet suit.  You’ll indicate which you want to participate in during the registration process.

Race Day Schedule

5:30 am to 6:15 am:  Race-day registration

5:30 am to 6:30 am:  Check-in for pre-registered swimmers

6:30 am:  Pre-swim meeting to outline course, safety items, answer questions

7:00 am:  Race starts!


The 2.4 Mile event is open to swimmers at least 13 years of age as of race day.


Swimmers must wear the race swim cap.

All WOWSA rules apply including swimsuit definitions. Exceptions and clarifications include:

Unlike many open water events, the Horsetooth Open Water Swim allows no drafting except where unavoidable at the start. If flagrant drafting is observed, that swimmer will be disqualified.

WOWSA Marathon and Channel Rules state swimsuits shall not go beyond the end of the groin or shoulders.  The Horsetooth Open Water Swim allows the swimsuit to extend to the knees.  Any swimsuit that does not meet these requirements will be classified as a wet suit swimmer.


First, second and third place, male and female, will receive a medal in each category (wet suit and non-wet suit).

Pledge Program

A portion of the Horsetooth Open Water Swim registration fee is just one of the ways Team Wellness & Prevention raises money to fund programming.

We need your help to raise even more funds. Please create a donation page when you register online, and help us continue to the fight against drug and alcohol abuse. Learn more about the pledge program.

Registration Deadlines

Fees cover safety (Dive Rescue, EMTs), t-shirt and awards. A significant portion is a donation in support of Team Wellness and Prevention.

Until July 31
Register online: $60

August 1 to August 11
Register online: $65
No t-shirt for late registration

Day of Race Registration
Register at check-in: $75
No t-shirt for day of race registrants.