Colorado · Half Marathon · 5K
Platte River Half-Marathon, Relay & 5k
Platte River Half-Marathon, Relay & 5k is a half marathon and 5K event held in Littleton, Colorado. Its next confirmed date is Sunday, April 11, 2027. About 2,900 runners take part across all distances.
- Race day
- April 11, 2027
- Location
- Littleton, CO
- Field size
- ~2,900 runners
Race details
- Date
- Sunday, April 11, 2027
- Location
- Littleton, Colorado
- Distances
- Half Marathon, 5K
- Field size
- About 2,900 runners
- Registration
- runsignup.com
- Official website
- platteriverhalf.com
Registration, course & weather
- Registration status
- Open
- Start time
- 7:00 AM MDT
- Course profile
- Out-and-back course; Road surface
About the Platte River Half-Marathon, Relay & 5k
Welcome to the Platte River Half Marathon, Relay & 5k race, one of the most exciting and popular races in the Denver Metro Area! This race is held annually in Littleton, CO. We’re thrilled to announce that registration for our upcoming 2027 event on Sunday, April 11th is open for the half-marathon and relay race. The race starts and finishes next to the beautiful Platte River Trail and adjacent to the popular Breckenridge Brewery campus. Join us for an epic post-race party at the Brewery with f…
More half marathons in Colorado
Coming up next, by confirmed date.
More races in Littleton
More upcoming races in Colorado
Keep exploring
- All races in Colorado
- 5Ks in Colorado 120 upcoming races
- 10Ks in Colorado 70 upcoming races
- Half Marathons in Colorado 51 upcoming races
- Marathons in Colorado 13 upcoming races
- Running in Littleton 6 upcoming races
- 5Ks in the United States 6,000 upcoming races
- Half Marathons in the United States 1,668 upcoming races
- Spring Half Marathons
- April Half Marathons
- April races in Colorado
- Half Marathons in Utah 47 upcoming races
- Half Marathons in Kansas 21 upcoming races
- Half Marathons in Nebraska 17 upcoming races
- Half Marathons in New Mexico 19 upcoming races
Guides from the RaceRove blog
- 8 min read How to Choose the Best Half Marathon for a PR, Racecation or 50-State Challenge The best half marathon depends on what you want from it. How to choose a course for a personal record, a race worth travelling for, or an efficient stop on a 50-state challenge.
- 7 min read How to Find a 5K, 10K, Half Marathon or Marathon Near You A practical way to find running races near you: pick a distance, decide how far you'll travel, read the listing properly and confirm the details before you register.
- 9 min read How to Run a Race in All 50 States How to plan a 50-state running challenge: set your own rules, group states into trips, build a calendar around the seasons, budget for it and keep track of every finish.
- Blog All guides Planning advice for finding, choosing and travelling to races.
Platte River Half-Marathon, Relay & 5k: common questions
- When is the Platte River Half-Marathon, Relay & 5k?
- The next confirmed date is Sunday, April 11, 2027.
- Where is the Platte River Half-Marathon, Relay & 5k held?
- In Littleton, Colorado.
- What distances does the Platte River Half-Marathon, Relay & 5k offer?
- Half Marathon and 5K.
- How many people run the Platte River Half-Marathon, Relay & 5k?
- About 2,900 runners across all of its distances. That figure is an estimate of the field size, not an entry cap.
- How do I register for the Platte River Half-Marathon, Relay & 5k?
- Registration is handled by the organiser at runsignup.com. Entry fees, caps and deadlines are set there.
- Is registration open for the Platte River Half-Marathon, Relay & 5k?
- Yes — registration is open. Listed fee for the longest distance, $80 (from runsignup.com, checked October 6, 2026).
- What time does the Platte River Half-Marathon, Relay & 5k start?
- 7:00 AM MDT.
- What is the course like at the Platte River Half-Marathon, Relay & 5k?
- Out-and-back course; Road surface.
Plan this race in RaceRove
Save it to your plan, compare it with other races, check typical race-day weather and track your 50-state progress in the interactive app.