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Details for this race  and its 3 related events  are listed below. Some races allow participant registration  for their events. Please check below and where available you may Register for Event  and see Who's Registered! Race Information Race Name: Great Falls Half (Half/10k/5k) Location: Potomac State: Maryland, United States Posted: October 2nd, 2026 9:10 pm Event Information Name of Event: Great Falls Half Marathon Distance: 13.10 Measurement: Miles Date: Saturday November 21st, 2026 Start Time: 12:00 pm Event Registration Schedule Currently runner registration is not available through the website of RunRace for this event. Click the Race Detail tab above and check with the specific race website for more information.   Event Information Name of Event: Great Falls 10k Distance: 6.20 Measurement: Miles Date: Saturday November 21st, 2026 Start Time: 12:30 pm Event Registration Schedule Currently runner registration is not available through the website of RunRace for this event. Click the Race Detail tab above and check with the specific race website for more information.   Event Information Name of Event: Great Falls 5k Distance: 3.10 Measurement: Miles Date: Saturday November 21st, 2026 Start Time: 1:00 pm Event Registration Schedule Currently runner registration is not available through the website of RunRace for this event. Click the Race Detail tab above and check with the specific race website for more information.   2004-2026 : All rights reserved Terms and Conditions