Half Marathon 2025 Usa Route. An intimate, unique and storied half marathon and relay that promises to be a fairly tale event for the books. Potomac river run half marathon.

Always visit the race’s website for the most complete and accurate race information. The 2025 runner’s world marathon calendar spans the united states, and includes everything from marathons to half marathon, and even a few 5ks, 10ks, and more.