Platte River Half-Marathon
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Event overview
The Platte River Half-Marathon and Relay takes place in Littleton, Colorado on April 12, 2026. The event includes a half marathon, a half marathon relay, and a 5k. Entry fees are non-refundable and non-transferable, and there are no deferrals to future years. A portion of race proceeds is donated to the Leukemia & Lymphoma Society.
- Half Marathon : 13.1 miles
- Half Marathon Relay : team relay format (three-person teams noted in race materials)
- 5k : 5 km
Course and race details
The race uses an out-and-back route along the Platte River Trail with a total ascent of about 300 feet. Start and finish are next to the Reynolds Landing trailhead parking lot near the Breckenridge Brewery campus in Littleton. The course passes through Littleton and nearby communities including Englewood, Sheridan, and Denver.
All finishers receive event items such as a long-sleeve tech T, a finisher’s medal, a souvenir finisher’s cup, and an e-goodie bag. A post-race party is held at the Breckenridge Brewery area, featuring food, vendors, live music, and beer offerings. The published race location is 6745 S. Santa Fe Dr., Littleton, CO 80120. Visit the organization's website for the most recent information.
