Course
Out-and-back along the Platte River Trail, starting and finishing at the Reynolds Landing trailhead in Littleton and passing through Englewood, Sheridan and Denver. Total ascent is around 300 feet, making it a fast, gently rolling course. Half marathon, three-person relay and 5K options, with food and live music at the finish.
Key dates
- !RegistrationOpen now
- ★Race daySun 11 Apr 2027
About
Lace up for the oldest half-marathon and relay race in the Mile High City! With the morning sunbeams reflecting off the river and the cityscape in the distance, you'll experience the best of both worlds as you race through Littleton, Englewood, Sheridan, and Denver. With a total ascent of 300 feet, this scenic out-and-back course is perfect for runners of all ages, levels, and abilities.
Save Platte River Half Marathon & Relay to your season and RunCalendar reminds you the morning entries open and before they close. Free on iPhone, no account needed.
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Earth Day 5K
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Horsetooth Half Marathon
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A confirmed date shows its day; a provisional one shows only its month, because we won't claim a day we don't have. This page is rebuilt every night from the RunCalendar catalogue.