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C&O Canal Lock 21
One of 4 national park listings in Potomac.
About C&O Canal Lock 21
C&O Canal Lock 21 is a national park in the attractions and activities sector, based in Potomac, MD. Its recorded address is 10700 Swains Lock Rd, 20854. The listing includes a telephone number. It is one of 4 national park listings tracked in Potomac; the nearest comparable listing is Billy Goat "A" Trail, about 1.9 km away in Gaithersburg.
- Address
- 10700 Swains Lock Rd, Potomac, MD, 20854
- Phone
- +13017394200
- Social
Questions
Where is C&O Canal Lock 21 located?
10700 Swains Lock Rd, Potomac, MD, 20854
How do I contact C&O Canal Lock 21?
+13017394200
What type of business is C&O Canal Lock 21?
C&O Canal Lock 21 is a national park (attractions and activities) in Potomac.
Nearby national park
- Billy Goat "A" TrailGaithersburg1.9 km
- Great Falls OverlookPotomac3.9 km
- Great Falls ParkMcLean4.1 km
- Great Falls National ParkGreat Falls4.7 km
- Great Falls National ParkPotomac5.6 km
- Great Falls National ParkRockville8.9 km
- Greatfalls National ParkMcLean10.0 km
- Wolf Trap National Park for the Performing ArtsVienna10.5 km
- Great Falls National ParkBethesda8.6 km
- Chesapeake & Ohio Canal National Historic ParkPotomac9.5 km
- Turkey Run ParkMcLean11.1 km
- George Washington Memorial ParkwayMcLean11.2 km
- Great Falls ParkMcLean12.2 km
- George Washington Memorial ParkwayMcLean11.3 km
- LBJ Memorial Grove on the PotomacMcLean11.5 km
Cite this page
“C&O Canal Lock 21, Potomac — business.wiki, retrieved August 2026.” Facts on this page come from openly licensed data (Overture Maps Foundation) and are refreshed with each monthly release; sourcing is documented on the methodology page.