Herndon
Trail Running Calendar near Herndon 2026-2027
Explore the top trail runs near Herndon for 2026-2027! We've gathered 83 exciting trail runs in the area. Check out our detailed list below to find your next local trail run.
May 2027
A 24 hour Backyard Ultra on Mason Neck near Lorton where runners repeat a 4.167 mile loop each hour; limited to 100 entrants with basic fluids and snacks provided.
June 2027
A backyard style ultra in Knoxville MD where runners repeat a 4.167 mile loop each hour until one remains; includes a 1 mile Mortals Edition with a tie-breaker.
Nighttime trail ultrarun at Prince William Forest Park offering 50 mile and 25 mile options, strict cutoffs, required lights and mandatory hydration.