Fishing
Chesapeake Bay Fishing Reports, Chesapeake Fishing Online, Fishing In And Around Maryland, Indian Head Charters, Marine Listing Service, Maryland Charter Boat Association, Potomac Guide Service, Sportsman's Resource, Inc., The Upper Bay Charter Captains Association
Maryland Artifact Recovery Society (MARS)
Metal detecting club. Site offers a newsletter, photos, applicable state park regulations, classifieds, and object identification requests.
Maryland Geocaching Society
Geocaching related resources related to caching activities in Maryland. Site includes forums, chat, cache listings and coming events
Maryland Outdoor Club
Free club promoting adventure sports, travel, and social activities statewide. Includes club background, upcoming events, membership information, and area happenings.
Maryland Outdoor Group
Yahoo group for 20- and 30-somethings in the central Maryland/northern Virginia/Washington D.C. area. Fir those interested in hiking, camping, backpacking, climbing, spelunking, walking, traveling, and sight-seeing.
Maryland Outdoors
Directory of Maryland-based resources for outdoor recreation activities.
Maryland Watermen's Association
Focuses on the interests of all who derive beauty and benefit from the waters of the Chesapeake Bay. Features overview of events, programs and services, special interest groups, and contact details.