Ralston Creek Half Marathon & 5k

Experience the beauty of Arvada, Jefferson County, Colorado at the Ralston Creek Half Marathon & 5K on February 15, 2026. This winter running event offers a scenic half-marathon and a 5K race amid the stunning Denver Metro area backdrop. With courses winding through picturesque roads and bike paths, runners of all levels will enjoy the rolling terrain. Secure your spot early as the half-marathon is limited to 650 participants and the 5K to 350. Finishers will receive a coveted medal, and both races include perks like FREE race photos, hot cocoa, and delicious quesadillas. Celebrate post-race at the Colorado Tap House with live music and beverages. Whether you're aiming for a personal best or running for fun, the Ralston Creek Half Marathon & 5K guarantees an unforgettable winter running experience.