Platte River Half-Marathon
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Platte River Half-Marathon and Relay : April 12, 2026
The Platte River Half-Marathon and Relay takes place on April 12, 2026 in Littleton, Colorado (6745 S. Santa Fe Dr., Littleton, CO 80120). The event includes multiple race options:
- Half Marathon (13.1 miles)
- Half Marathon Relay
- 5k
Registration is open for the 2026 event. Entry fees are non-refundable and non-transferable, and there are no deferrals to future years. A race bundle option pairs this event with the Colorado Marathon in Fort Collins.
Course, post-race, and additional information
The out-and-back course follows the Platte River Trail, starting and finishing next to the trail and adjacent to the Breckenridge Brewery campus. The route passes through Littleton, Englewood, Sheridan, and Denver and has a total ascent of 300 feet. A post-race party at Breckenridge Brewery includes food vendors, live music, and beer. The race donates a portion of proceeds to the Leukemia & Lymphoma Society. Contact and race-day details are available on the event website. Visit the organization's website for the most recent information.
