Below are dog parks that can be found in the DC/MD/VA area. If you have a park you want to add, please leave a comment at the bottom! Keep in mind, some of these parks are membership based and may require a fee; check out the websites to make sure. Most, if not all, parks required up-to-date vaccinations, including rabies, as well as visible license tags.
Maryland
Baltimore County
BARC Park at Hannah More
Reisterstown, Maryland
Requirements: Membership $25/yr, licensed in Baltimore County.
Howard County
Worthington Dog Park
Ellicott City, MD
Requirements: Purchase of Daily Pass or Annual Pass ($40/yr)
Montgomery County
Black Hills Regional Park
20930 Lake Ridge Drive
Boyds, Maryland 20841
Cabin John Dog Park
10900 Westlake Drive
Bethesda, Maryland
Green Park Dog Exercise Area
151 Bickerstaff Way
Gaithersburg, Maryland
Ridge Road Recreational Park
21155 Frederick Road
Germantown, Maryland
Wheaton Regional Park
11751 Orebaugh Avenue
Glenmont, Maryland
Prince Georges County
Bowie Dog Park
Northview Drive across the street from Enfield Drive
Bowie, Maryland
College Park Dog Park
Acredale Park on Metzerott Road
College Park, Maryland
Greenbelt Dog Park
Hanover Drive
Greenbelt, Maryland