For those that might visit Capital Raceway in Crofton, MD there is a local quick route we used to do here that begins just a few minutes from the track. If you are planning on going to the track early on a Saturday morning then it's still empty if you meet up for coffee first and get on the route by 730am.
Anne Arundel County
Loop from Rt 3 South to Rt 450
19 Miles
Link to map:
MD-450 to Chesterfield Rd - Google Maps