Rivnuts from Homestead,PA on 3/8/2022 10:42:43 AM:
As I am not a DC local, I can’t offer any good info on where to park cheaply and safely near Union Station. I have, however, ridden from Milepost 0 to Union Station at the end of some of my trips. It takes about 20 minutes to ride the 3.25 miles. Google Maps’ recommended route across Constitution Avenue along the Mall is a nice and scenic route. Of course, it follows city streets but DC is pretty biker friendly. You don’t need to arrive particularly early at the train station as you can roll your bike right up to the departure gate/door just moments before it opens for boarding. Assuming you already have your tickets and have removed your bags from your bikes, there is very little lead time required at the train station.