Richard from DC on 7/14/2017 6:22:39 AM:
Yes. There is water and a restroom two miles after Great Falls where Old Anglers Inn is. There is a restroom and water at Carderock. There may water at Locks 10 and 8. There is water and a concession stand at Fletcher's Boathouse. There is no water fountain at zero, but there are plenty of places to buy drinks.