Associations:

Amatuer Trapshooting Association

Maryland State Sportsmen's Association

National Sporting Clays Association

Clay Targets Online - Maryland

The Lost Target - Maryland

Delaware Trapshooting Association

Virginia Trapshooting Association

Leagues:

Heart of Maryland

Tri-State Trap League

Southern Maryland Winter League

Gun Clubs:

Carroll County Gun Club

Tuscarora Gun Club

Loch Raven Skeet and Trap

 Advice:

Trapshooting by Frank Hoppe