Little Patuxent River Half Marathon, 10K, & 5K
Updated
Sunday, January 31, 2027, first start 8:00 AM, in Columbia (9175 Guilford Road). Distances: 5K, 10K, 9.66 miles, Half marathon, 16.1 miles. Entry from $50 to $125.
- Date
- Sunday, January 31, 2027
- Start time
- 8:00 AM (earliest wave)
- Location
- 9175 Guilford Road, Columbia, DC 21046
- Area
- Baltimore & Annapolis, Washington, DC
- Distances
- 5K10K9.66 milesHalf marathon16.1 miles
- Course
- Trail (dirt or single-track on at least part of the course)
- Price
- $50 to $125 plus the platform's processing fee
- Next price increase
- None published
- Registration
- Closed online. Opened October 23, online signup closes Wednesday, January 27, 2027
How to register
Registration is on RunSignup. Pick your distance, add any extras, and you'll get a confirmation email with your bib details.
See race page on RunSignup →Race website
Course and race notes
Enjoy nature in one of the most beautiful areas of Columbia, MD. Starting and finishing at the Guilford Pratt Truss Bridge, the half marathon (13.1 miles), 10K (6.55 miles) and 5K (3.1 miles) takes place on the Patuxent and Wincopin trails. The course runs along the Little Patuxent and Middle Patuxent River.
From the race's own listing. Check the race website for the course map and parking.
Source: RunSignup public race API, refreshed 2026-10-17. Details can change; the registration page is the final word.