Colorado · Half Marathon · 5K · 10K
Summer Splash Prairie Dog Half, 10k, & 5k
Summer Splash Prairie Dog Half, 10k, & 5k is a half marathon, 5K and 10K event held in Castle Rock, Colorado. Its next confirmed date is Saturday, July 17, 2027. About 170 runners take part across all distances.
- Race day
- July 17, 2027
- Location
- Castle Rock, CO
- Field size
- ~170 runners
Race details
- Date
- Saturday, July 17, 2027
- Location
- Castle Rock, Colorado
- Distances
- Half Marathon, 5K, 10K
- Field size
- About 170 runners
- Registration
- runsignup.com
Registration, course & weather
- Registration status
- Open
- Start time
- 6:30 AM MDT
- Course profile — Half Marathon
- Out-and-back course; Road surface
- Course profile — 10K
- Out-and-back course; Road surface
- Course profile — 5K
- Out-and-back course; Road surface
About the Summer Splash Prairie Dog Half, 10k, & 5k
Welcome to the Summer Splash Prairie Dog Half, 10k & 5k in Castle Rock, Colorado. Part of the Prairie Dog Half race series, join us in July as we race through Castle Rock along the East Plum Creek Trail. For all race info, click the "race info" tap (or the links at the bottom)!
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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.
Summer Splash Prairie Dog Half, 10k, & 5k: common questions
- When is the Summer Splash Prairie Dog Half, 10k, & 5k?
- The next confirmed date is Saturday, July 17, 2027.
- Where is the Summer Splash Prairie Dog Half, 10k, & 5k held?
- In Castle Rock, Colorado.
- What distances does the Summer Splash Prairie Dog Half, 10k, & 5k offer?
- Half Marathon, 5K and 10K.
- How many people run the Summer Splash Prairie Dog Half, 10k, & 5k?
- About 170 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 Summer Splash Prairie Dog Half, 10k, & 5k?
- Registration is handled by the organiser at runsignup.com. Entry fees, caps and deadlines are set there.
- Is registration open for the Summer Splash Prairie Dog Half, 10k, & 5k?
- Yes — registration is open. Listed fee for the longest distance, $74 (from runsignup.com, checked October 6, 2026).
- What time does the Summer Splash Prairie Dog Half, 10k, & 5k start?
- 6:30 AM MDT.
Plan this race in RaceRove
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