
From the Organizer
Horsetooth Tri Training Open Water Swim Series & Clinics
Whether you’re training for a triathlon, racing SUP, or just want to gain confidence in open water, this 8-week series offers hands-on practice and coaching in one of Colorado’s most iconic reservoirs.
Each week includes these options to choose from:
– Open Water Swim Clinics
– SUP Clinics designed for stand-up paddle triathletes and recreational paddlers
– Open Water Swim Series to build confidence, endurance, and race readiness
– SUP races/challenges
The Open Water Swim Series is a non-competitive and non-timed event designed as a weekly training series to give people safe access and practice to open water swimming. There will be a low-key group start to simulate real race conditions, with swim distances of your choice. This series is ideal for all experience levels, whether you're aiming to complete your first tri or refine your open water game.
Distances & Pricing
Race Location
About This Sport
Endurance Grid is here to help you understand the sport, decide if it's the right fit, and learn how to prepare. For course distances, logistics, and race-day specifics, always defer to the race organizer's event page.
Three sports, one race — swim, bike, run in sequence, with transitions that are a discipline of their own.
Open water, open roads, and competition with yourself. Cross the finish line knowing what it took to get there.
Swim, bike, run — back to back. The sprint distance makes it far more accessible than most people think.
Coming Up
Frequently Asked Questions (FAQs)
Horsetooth Tri Training Open Water Swim Series
Jun 3, 2026