WKR from Brunswick, MD on 8/23/2025 7:31:45 PM:
I would go to Brunswick, cross the Potomac there, and head to the W&OD. The bridge over the Potomac and the bit on Berlin Tpke may be uncomfortable, car-wise, for people who aren't accustomed to riding on the road (total distance for this bit is under 1.5 miles). Although Berlin Tpke takes you all the way to Purcellville where you can hop on the W&OD it's a 55mph road without much of a shoulder so I wouldn't go that way (even as an experienced road rider). You can take the first right off of Berlin Tpke onto Tollhouse Rd to get away from most of the traffic and then take backroads to Purcellville instead. That's what I would do.