Metro now serves Dulles. Take metro to Union Station and hop the Amtrak to Harper's Ferry. here is a link. https://www.flydulles.com/iad/silver...rorail-station
Metro now serves Dulles. Take metro to Union Station and hop the Amtrak to Harper's Ferry. here is a link. https://www.flydulles.com/iad/silver...rorail-station
If you don't stand for something, you will fall for anything.
The new silver line will eventually go all the way to Dulles, but now only phase 1 is open. Phase 2 is due to be open next year. For now, you take a bus from the airport to the closest metro rail station. You then take the Metro to the train station (which requires a transfer to the red line). I did this both directions a few years ago en route to my SNP hike. It's easy.