- Aquarium Divers SCUBA Club
 - Meets at the Shedd Aquarium monthly, hosts speakers and social events. Dive trips taken to the Great Lakes, midwest, and the Caribbean. - Arlington Heights Park District
- Aurora Girl Scout Council
- Overview of the Aurora Girl Scout Council
- Birds of Fermilab, The
- Information about the birds recorded on the 6,800 acre site of the Fermilab accelerator laboratory located in the far west suburbs of Chicago.
- BSA 13
- Features information about Pack, Troop, and Crew 13.
- bucknbass.com
- Fishing and hunting magazine offering trivia, reports, guides, and more.
- Cahokia Mounds State Historic Site@
- Cahokia Mounds State Historic Site
- 2200-acre tract preserving the remnants of the ancient Mississippian's central city, now situated between St. Louis, Missouri, and Collinsville, Illinois.
- Canyon Camp, Boy Scouts of America
- Located in a canyon between Stockton and Apple River, Illinois. Features schedule, list of activities, map, virtual tour, and contact info.
- Carlyle Yacht Club
- Promotes sailing and racing at Carlyle Lake in the St. Louis area. Also provides facilities for cruising, education, and social activities.
- Chicago - Mackinac Race@
- Chicago Aquanauts Scuba Association
- Family oriented scuba club offering training, fun and fellowship.
- Chicago Boaters & Sailors Online
- Offers information on boating, sailing, and jet skiing, as well as a forum for water sport enthusiasts.
- Chicago Mountaineering Club
- Chicago Scuba Diver
- Features information about scuba diving and scuba equipment as well as diving locations in Chicago, Illinois.
- Chicago Wilderness
- Regional nature reserve dedicated to the protection, restoration, and stewardship of the natural communities of the Chicago region.
- Chicago Yacht Club
- Includes information on racing, the sailing school, and a calendar of events. Home of the Race to Mackinac (The Mac).
- Chicagoland Fishing Has No Boundaries
- All-volunteer, nonprofit organisation dedicated to opening up the world of fishing to people with disabilities.
- ChicagolandFishing.com
- Provides anglers with current conditions and angling opportunities, as well as bulletin boards.
- ChiTown Cachers
- Diverse group of people living in the Chicago metro area and united by a common interest in geocaching.
- Crab Orchard National Wildlife Refuge
- With three lakes and approximately 43,660 acres of beautiful scenery.
- Des Plaines Valley Council
- Serving Cook and DuPage counties.
- Des Plaines Yacht Club
- Offers contact information, calendar of events, and photos.
- Etchells Fleet 11
- Includes information on fleet members, a racing schedule and race results.
- Friends of the Parks
- Not-for-profit citizens¿ membership organisation dedicated to the protection, preservation and continued improvement of Chicago's parks and lakefront beaches.
- Girl Scouts Service Unit 679
- Offers crafts, songs, ceremonies, and other information for girls, leaders, and families.
- GORP - Chicago Outdoors
- Expert suggestions on outdoor recreation, including hiking and biking in the area.
- Great Lakes Cruising Club
- Cruising club on the Great Lakes, sailing, yachting, harbours, marinas, anchorages, weather, events, tips, and more.
- Great Lakes Sport Fishing Council
- Confederation of organisations and individuals who share a concern for the present and future of sport fishing, our natural and stocked resources and the ecosystem in which we live.
- Gurnee Park District
- Site includes listings of recreational classes offered by the District.
- Illinois Association of Park Districts
- Nonprofit service, research and education organisation that represents park districts, forest preserves, conservation and recreation agencies.
- Illinois Chapter of Ted Nugent's Sportsmen of America (TNUSA)
- Information about events, gun and hunting legislation, and more.
- Illinois Prairie Path
- 55-mile-long biking, hiking, jogging, equestrian, and nature trail in Cook, DuPage and Kane Counties.
- Lake Michigan Sail Racing Federation (LMSRF) Area III
- Provides schedules, results, bulletin board, entry forms, and more.
- Lake Renwick Heron Rookery Nature Preserve
- Provides protected nesting sites for the local herons and egrets.
- Lakota Lodge #175
- Lincoln Park Boat Club
- Offers paddling, rowing and sculling in Chicagoland.
- Lisle Park District
- Educational programme and facilities information.
- Lunkers Unlimited
- Bass fishing club. Features tournament results, meeting information, and more.
- Mackinaw Canoe Club
- Not-for-profit organisation of amateur canoeists.
- Midwest Open Racing Fleet (MORF)
- Sailboat racing organisation located in Chicago, IL. We sail on Lake Michigan and races consist primarily of Olympic courses along with port to port races.
- Morton Arboretum@
- National Bird-feeding Society
- Provides information on attracting and feeding wild birds.
- Northwest Suburban Council, Boy Scouts of America
- Oak Run
- Located near Spoon Lake, this resort offers boating, fishing, waterskiing and golf.
- Old Plank Road Trail
- Includes maps, history, and sights along the paved recreation path in Cook and Will Counties, Illinois.
- Owasippe Staff Association
- Devoted to present and former staff and friends of the Owasippe Scout Reservation, owned and operated by the Chicago Area Council of the Boy Scouts of America.
- Pack 3039
- Pack 91 - Grayslake, IL
- Features pack information, event calendar, and trail maps.
- Parkways Foundation
- Seeks to promote and expand public participation in and awareness of Chicago's parks through fundraising and other support efforts that will help improve, develop, and maintain Chicago Park District programmes and facilities.
- Peoria Bassmasters
- Includes club history, tournament information and standings, lake reports, and club newsletter.
- Polar Bares Snowmobile Club of Northern Illinois
- Includes club events, photos, and more.
- Prairie State Canoeists
- A nonprofit club that organises canoe and kayak trips, strives to improve river access, and promotes general paddling activities.
- River Trails Park District
- Provides leisure activities while preserving open space, conserving the environment and educating the community.
- Riverbend Benders Snowmobile Club
- Family snowmobiling and year round fun.
- Sail Chicago
- Local community based nonprofit sailing programme.
- Shabbona's Lakeside Online
- Shabbona Lake State Park is located in Northern Illinois.
- Shawnee National Forest
- Headquartered in Harrisburg, IL.
- Skokie Park District
- Snow Hunters of Northern Illinois
- Snowmobile club serving the Chicago and Western suburban areas.
- Southern Valley Hunting Club
- Information on goose and duck hunting in Southern Illinois around the Marion and Crab Orchard Lake area.
- St. Charles Park District
- Defines the programmes and available facilities through the St. Charles Park District.
- Team April
- Family geocaching team in the Chicago area. Meet Mac, the Geocaching WonderDog, and learn about their cache finds and hides.
- Team Whiskers
- Catfishing team. Includes information on baits, rigs, tackle, recipes, tournaments, and more.
- Troop 100
- Troop 160
- Troop 175
- Troop 364
- Troop 510
- Troop 52
- Troop 56
- Part of the Mississippi Valley Council.
- Troop 71
- Troop 865
- Volo Bog State Natural Area@
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