Washington, Baltimore and Annapolis Trail

WB&A Trail
Length11.7 mi (18.8 km)
LocationAnne Arundel and Prince George's counties, Maryland, USA
TrailheadsAnnapolis Rd and Seltzer St
Lanham, Maryland
38°57′29″N 76°49′29.4″W / 38.95806°N 76.824833°W / 38.95806; -76.824833
Odenton Rd and Piney Orchard Pkwy
Odenton, Maryland
39°5′2.2″N 76°42′0.5″W / 39.083944°N 76.700139°W / 39.083944; -76.700139
UseHiking, biking
DifficultyEasy
SeasonYear-round
SightsPatuxent River, Little Patuxent River
HazardsTick-borne diseases
Limited water
Poison ivy
Venomous snakes
Trail map

The Washington, Baltimore and Annapolis Trail (WB&A) is an 11.7-mile (18.8 km) long rail trail from Lanham to Odenton in Maryland. The trail gets its name from the Washington, Baltimore and Annapolis Electric Railway on whose right-of-way it runs, but does not connect to any of the cities in its name.

The trail formerly existed in two separate pieces, one in Anne Arundel County and the other in Prince George's County, separated by the Patuxent River. Construction of a bridge over the river was delayed for over two decades due to a property dispute; however, the trail was realigned and design of the bridge began in 2002. It was completed in spring of 2025 with a grand opening later.

Additional plans exist to extend the trail southward to the Washington, D.C. border.

The WB&A Trail makes up part of both the East Coast Greenway - from Calais, Maine to Key West, Florida - and the American Discovery Trail - from the Atlantic coast of Delaware to San Francisco, California.