The B&A Trail is 13.3-mile paved mutli-use path stretching from Glen Burnie to Annapolis. It’s one of the the best spots in the area for a long off-road run. The Baltimore trailhead is at Saw Mill Creek Park, near Baltimore-Washington International Airport. The Annapolis trailhead is off Boulters Way, just north of Highway 50. There are half-mile markers along the way.  Choose a section or make it a marathon(!). Key distances and landmarks along the way, headed south:

3.3 miles:     Pasadena
5.5 miles:    East-West Blvd., Millersville
6 miles:       B&A Trail Park HQ
8.6 miles:    Severna Park (Earleigh Heights Ranger Station)
10.3 miles:   Anne and Arundel Community College
13.3 miles:    Annapolis end trailhead off Boulters Way

Add-Ons: At the Saw Mill Creek Park trailhead, good connector to the BWI Trail.