Point of Rocks is very easy to get to from Md or Va, though it is a far drive for some people. It's right along Rte 15 on the Md side of the Potomac. So in Md, just drive to Frederick and get on Rte 15 south and take the last left turn before the bridge over the river (approx 15-20 minutes from Frederick). Coming from Va, go to Leesburg and get on Rte 15 north and take the first right turn after crossing the bridge (more than 20 minutes from Leesburg, I think). Once that turn's been made, you'll immediately see a sign for a right turn to the C&O Canal. Parking can also be had at the train station farther down the road past that sign.