Lake Nighthorse Triathlon

SEP

12

2026

This triathlon at Colorado's scenic Lake Nighthorse offers Sprint and Olympic distances, including relay options. The course features an open-water swim at altitude, a bike route with climbs, and a rolling run on dirt trails. It is a USAT-sanctioned event for participants aged 15 and over.

Sat 12 Sep 2026

Durango, Colorado

Registration

Individual Olympic Individual Sprint Sprint Relay - Coed Sprint Relay - Female Sprint Relay - Male

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Event Overview

The Lake Nighthorse Triathlon is a multisport event featuring Sprint and Olympic distances. The race takes place at the Lake Nighthorse Recreation Area near Durango, Colorado. It is a USA Triathlon (USAT) sanctioned event.

Course Details

The swim portion is a 750-meter open-water segment in Lake Nighthorse at an elevation of 6900 feet. The bike course includes climbs, and the run course is on a rolling, mostly natural dirt and gravel surface with views of the lake. The Olympic distance course consists of two laps of the Sprint course for all disciplines.

Available Events

The event includes the following entry categories:

Individual Sprint - Open to participants aged 15 and over.
Individual Olympic - Open to participants aged 15 and over.
Sprint Relay - Available in Male, Female, and Coed team categories.

Participant Information

Organizers note that the open-water swim is not considered easy, especially at altitude, and requires proficiency in freestyle swimming. They recommend that participants should be able to swim 1000 meters non-stop in a pool. Registration opens on February 1, 2026. Visit the organization's website for the most recent information.

Individual Olympic

Individual Sprint

Sprint Relay - Coed

Sprint Relay - Female

Sprint Relay - Male