Central Maryland
 Annapolis Striders Anne Arundel County: 410-268-1165, astriders@hotmail.com.
 Baltimore Road Runners Club Baltimore: 410-377-7327, brrc2000@bigfoot.com.
 BigBlue Running Baltimore.
 Canton Runners Baltimore City: skinbike22@gmail.com. Tuesday and Thursday at 7pm outside Canton Fitness.
 Crohn's & Colitis Team Challenge Baltimore: 646-641-1427, half-marathon training program in central Maryland.
 DetermiNation Baltimore Baltimore: The American Cancer Society DetermiNation endurance event program is a powerful and inspiring movement that saves lives by enabling athletes of all abilities to dedicate their training and participation in marathons, triathlons, cycling, and other endurance events to a lifesaving effort to fight cancer.
 Federal Hill Runners Baltimore City: FederalHillRunners@hotmail.com or Ryan McGrath.
 Eldersburg Rogue Runners Carroll County: 410-549-6296 x5.
 DC Road Runners Club Prince George's County and Washington, DC: 703-241-0395.
 Fells Point Runners Baltimore City: 443-629-5065, tim@fellspointrunners.com. Tuesday and Thursday night, and Saturday group runs.
 Baltimore Front Runners Weekly runs from Canton and Johns Hopkins: baltimorefrs@yahoo.com.
 Jeff Galloway Running Club and Marathon Training Weekly runs from Fleet Feet Sports in Pikesville.
 Howard County Striders Howard County: 410-964-1998.
 Leukemia & Lymphoma Society Team In Training Training programs for events such as the Rock'n'Roll Half-Marathon, Marine Corps Marathon, Baltimore Marathon & Half-Marathon, and Tri-American Triathlon at Disney World.
 The Mach Los Track Club Columbia based track club with the goal of developing Maryland's elite distance runners.
 Maryland Track Club Howard County - Twice a week track workouts.
 Baybrook Harriers Baltimore City and Anne Arundel County - track and cross country series races: 443-591-9586.
 Montgomery County Road Runners Montgomery County: 301-353-0200, info@mcrrc.org.
 NCR Trail Snails Baltimore County - weekly runs on the NCR Trail: prez@mail.ncrtrailsnails.com.
 Prince George's Running Club Prince George's County.
 RASAC Harford County: 410-838-7973.
 Run, Howard, Run! Howard County.
 Running, Walking, Eating Volunteering Club Baltimore - Saturday runs followed by brunch and monthly non-profit volunteering: 410-773-8331 Mark Brody, Brodymark@yahoo.com.
 6 o 6 Running Group of Annapolis Group runs every weekday starting at 6:06 am at Church Circle and Main Street in Annapolis: Gonzocb@aol.com.
 Team Endure Harford County racing team: ChadChadwik@comcast.net.
 Terp Runners The University of Maryland Running Club.
 Triathlon Academy
 Westminster Road Runners Carroll County: wrrc@carr.org.
 Baltimore/Annapolis Hash House Harriers Trail running group that meets every Sunday at 3.
 Maryland Dirt Road Hash
 Capitol Hill Runners Accokeek, Prince George's County: 301-283-0821.
 Goddard Running and Orienteering Club NASA Goddard Space Flight Center, Greenbelt: 301-776-7069(D), 301-286-8061(E).

 Eastern Shore
 Eastern Shore Running Club Snow Hill, Worcester County: 410-603-8404, HEagle@wcboe.org.

 Southern Maryland
 Chesapeake Bay Running Club Southern Maryland - Calvert, Charles, and St. Mary's County: 301-472-4346(E), theimhofs@netzero.net.
 Southern Maryland Striders Track Club Clinton, MD.

 Western Maryland
 Carroll Creek Pacers Frederick: 301-898-3767.
 Cumberland Valley Athletic Club Washington County: 301-739-7004.
 Frederick Steeplechasers Frederick County.
 Hagerstown Runs Hagerstown, Washington County: 301-797-5981 (Tara Amann).
 Mountain Maryland Maratahon Club Cumberland.
 Queen City Striders Allegany County.
 Old Frederick And Rural Territory Hash House Harriers

 Creek Road Runners
 Downstate Delaware Striders
 The Grove Park Club
 Pike Creek Valley Running Club
 Races to Run Promotes and manages running, walking, and multi-sport events in Delaware, Southern New Jersey, Southeastern Pennsylvania, and Eastern Maryland.
 Seashore Strider Club
 Slower Sussex Harriers Running Club
 Team Slug
 Trail Dawgs
 Tri-Sports Road Runners Club Based in Dover, DE managing 50 events each year in Delaware and Maryland.
 Dewey Beach Hash House Harriers
 Hockessin Hash House Harriers

 Fast Tracks Running Club Valley Forge, PA, 610-353-8826.
 Harrisburg Area Road Runners Club
 Nittany Valley Running Club
 York Road Runners

 Fredericksburg Area Running Club
 GNATS National Capital Track Club
 Loudoun Road Runners
 Loudoun Special Forces Track Club
 McLean Youth Track
 Northern Virginia Running Club
 Potomac Valley Track Club
 Prince William Runners Club
 Quantico Orienteering Club 703-528-INFO.
 Reston Runners
 Richmond Road Runners
 Shenandoah Valley Runners
 Tidewater Striders
 Virginia Happy Trails Running Club
 Odyssey Adventure Racing Virginia based adventure racing group.
 Great Falls Hash House Harriers
 Mount Vernon Hash House Harriers
 Over the Hump Hash House Harriers

 Late Shift Runners
 Washington RunHers Club
 Washington Running Club
 DC Front Runners
 Team Lombardi Marathon training program and guaranteed entry into the Marine Corps Marathon.
 Potomac Runners
 The Running Enclave
 DC Full mOOn Hash House Harriers
 Everyday is Wednesday Hash House Harriers
 Washington DC Hash Harriettes and Harriers
 White House Hash Harriers
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