Holmes Run is a main tributary in the Cameron Run watershed, which begins in Fairfax County and crosses the City of Alexandria on the way to the Potomac River. Visit one of the maps below by clicking on the disclaimer, and then enter your address to see where you are in your watershed!
Tip: If accessing map on a mobile device, rotate screen to horizontal for best viewing.
Learn more about watersheds in Fairfax County and City of Alexandria.