Shasta Area Grotto
- Located in Northern California. Promotes conservation, study and preservation of caves. Features articles about safety, conservation, management, restoration and ethics. Includes photo galleries and contact information.
- http://www.caves.org/grotto/sag/

Willamette Valley Grotto
- Greater Portland area and chapter of the NSS. Offers recreational and scientific trips, surveying and mapping. Includes Constitution and Bylaws, meeting and membership information, calendar of events, photos and contacts.
- http://www.caves.org/grotto/wvg/index.htm

Central States Caving Society
- Founded in 1998. Dedicated to safe exploration and conservation in lower-central Missouri and western Kentucky. Includes trip pictures and contact information.
- http://www.centralstatescaving.com/

Sandia Grotto
- Located in Albuquerque, New Mexico. Chapter of the NSS promotes study, conservation, safe exploration and fellowship. Includes Constitution, meeting and membership information, and photographs.
- http://www.sandiagrotto.org/

Flittermouse Grotto of Western North Carolina
- Located in Ashville and member of the National Speleological Society. Promotes conservation of caves, safety in their exploration and fellowship. Includes meeting and contact information.
- http://www.caves.org/io/iolookup.php?ionum=000193

Potomac Speleological Club
- Based in the District of Columbia area. Formed in 1957 to explore, conserve and study caves. Includes trip reports, calendar of events, projects, photos, meeting and contact information.
- http://psc.cavingclub.org/

Wasatch Grotto
- Chapter of the National Speleological Society meets in Bountiful, Utah. Includes meeting and trip schedules, membership list, photos and contacts.
- http://www.caves.org/grotto/wasatch/

The Guano Page
- Southern Nevada Grotto, Las Vegas, Nevada. Dedicated to the preservation and conservation of caves in Southern Nevada. Information on meetings and trips, photographs and maps.
- http://www.guanopage.com/

Minnesota Speleological Survey
- Affiliated with the National Speleological Society. Dedicated to study, exploration and conservation of caves. Includes information about projects, meetings, membership and contacts.
- http://www.mss-caving.org/

Salt Lake Grotto
- Your portal to organized caving in Utah. Site includes meeting info, trip reports, upcoming trips, cave maps, and the Utah long and deep cave list.
- http://www.caves.org/grotto/slgrotto/

Cascade Grotto Home Page
- Based in Seattle, Washington. A chapter of the NSS dedicated to the study, exploration and conservation of caes and their contents.
- http://www.cascadegrotto.org/

SERA Karst Task Force (SKTF)
- Resource organization dedicated to karst conservation and the clean up of karst features and caves, through the education of both the public and caving communities. Includes membership details.
- http://groups.yahoo.com/group/sktfvolunteer/

West Michigan Grotto
- Formed in 1999 this chapter of the NSS is dedicated to study, exploration and conservation. Includes a calendar of events, membership and contact information.
- http://www.hodag.cavefrog.com/wmg/

Oregon Grotto of the Portland, OR / Vancouver, WA Area
- Located in Vancouver, Washington and dedicated to the exploration and conservation of caves. Highlights photos, upcoming events, articles, a meeting schedule, and membership details.
- http://www.oregongrotto.com/

Cave Conservation and Management Section of the National Speleological Society
- Provides a central clearinghouse for research, expertise, and information. Offers a newsletter, membership benefits, the CCMS constitution, bylaws, minutes, and future events.
- http://www.acave.us/ccms/

Tri-State Speleological Society, Inc.
- Chapter of the NSS and located in New Jersey. Promotes the exploration, conservation, and preservation. Includes membership and contact information.
- http://www.ts3.34sp.com/

The Detroit Urban Grotto
- Includes meeting and contact information, and membership roster. Features history, maps and survey statistics of the Fisher Ridge Cave System in Kentucky.
- http://home.flash.net/~mfitch/

Cave Diving Section of the National Speleological Society
- Promotes education, safety and conservation in underwater caves.
- http://www.nsscds.com/

HR3 Home Page
- An NSS affiliated survey team called HR cubed. Survey news, history, membership list, accomplishments.
- http://thelances.org/hr3/

Stonewall Cavers of the National Speleological Society
- Section of the NSS for gay, lesbian and bisexual cavers. Includes contact information.
- http://www.stonewallcavers.org/

Michigan Karst Conservancy
- Formed in 1983 and located in Ann Arbor. Aims to acquire, manage and protect unique geology and associated ecosystems. Includes details of projects and membership application.
- http://www.caves.org/conservancy/mkc/

The Gangsta Mappers
- Informal group throughout mid-Atlantic states devoted to cartography projects in Virginia and West Virginia. Includes summaries of current and past trips, photos and contact information. Password required to access websheets and schedule of events.
- http://www.psc-cavers.org/gangsta-mappers/

Florida Speleological Society
- Located in Gainesville and became a chapter of the NSS in 1956. Dedicated to exploration and conservation. Includes newsletter, trip reports, photos, meeting and contact information.
- http://www.caves.com/fss/index_ie.htm

Southern Colorado Mountain Grotto (SoCoMoGro)
- Located in Colorado Springs and a member of the NSS. Dedicated to exploration, conservation and preservation. Includes meeting information, trip reports and contacts.
- http://www.caves.org/grotto/scg/

Colorado Grotto
- Located in Denver and affiliated with the National Speleological Society. Dedicated to exploration, study and conservation. Includes meeting information, events, projects, photo gallery and contacts.
- http://www.caves.org/grotto/colorado/

Columbia Grotto of the National Speleological Society
- Activities in Calaveras and Tuolumne counties in California. Dedicated to promote exploration, conservation, study and preservation of caves. Includes meeting information, trip reports, photos and contacts.
- http://www.caves.org/grotto/columbia/

Triangle Troglodytes
- Located in Raleigh, North Carolina. Features trip and meeting schedules, newsletters, photo galleries and contact information.
- http://www.rtpnet.org/~tritrogs/

Mother Lode Grotto of the National Speleological Society
- Located in Sacramento, California and devoted to exploration, study and preservation. Includes information about meetings, membership, equipment, conservation, MLG history and contacts.
- http://mlg.hardakers.net/

Kansas Speleological Society
- Formed in 1983 to catalog, study and explore caves. Affiliated with the NSS. Includes membership and meeting information, library resources and contacts.
- http://www.caves.org/grotto/kss/

Silver Sage Grotto Home Page
- Chapter of the National Speleological Society was founded in 2001 for exploration, conservation and survey of South Central Idaho caves. Includes Constitution and Bylaws, event schedule, meeting and contact information.
- http://hiptr.home.mindspring.com/SSG/SSG_home.html

Wisconsin Speleological Society
- Has chapters of the NSS in Green Bay and Madison. Promotes exploration and study. Includes membership information, events, trip schedules and contacts.
- http://www.caves.org/grotto/wss/

Commander Cody Caving Club
- NSS grotto based in the Delaware Valley. Dedicated to exploration, study and conservation. Includes calendar of events, contacts, meeting and membership information, photo gallery and links.
- http://www.caves.org/grotto/cccc/Home.shtml

Central Connecticut Grotto
- Located in Plainville and is a chapter of the NSS. Includes Constitution, activities schedule, photos, membership form and contact information.
- http://www.ctcavers.org/

Central Arizona Grotto Website
- Promotes exploring, surveying, conservation, vertical work and safety techniques. Includes calendar of events, trip reports and contact information.
- http://caves.org/grotto/cag2/caghome.html

MIT Caving Club
- Located on Massachusetts Institute of Technology campus. Offers trips during the school year. Includes schedule of events and contact information.
- http://www.mit.edu:8001/activities/spelunk/home.html

Woodville Karst Plain Project
- Devoted to exploration of underwater caves in Big Bend area of northern Florida. Includes articles on history, equipment, procedures, decompression, diving updates, image gallery and contacts.
- http://www.wkpp.org/

Michigan Interlakes Grotto
- Based in Union Lake and is a chapter of the National Speleological Society. Promotes exploration and conservation. Includes upcoming events, meeting and membership information, photos, store and contacts.
- http://www.caves.org/grotto/mig/

Central New Jersey Grotto
- Chartered in 1978 for exploration, conservation and study. Includes membership manual, monthly meeting notice, newsletters, photo galleries, store and links.
- http://www.caves.org/grotto/cnjg/

Sligo Grotto of the NSS
- Based in Maryland and chapter since 1970. Dedicated to conservation, protection, exploration and surveying. No fixed meeting dates and locations. Includes newsletter, photo album, membership and contact information.
- http://www.caves.org/grotto/sligo/

Northern New Jersey Grotto
- Founded in 1952 and a chapter of the National Speleological Society. Contains contact information, meeting schedule, photos, upcoming trips and events.
- http://www.nnjg.org/

Baltimore Grotto of the NSS
- Founded in 1952 and dedicated to exploration, study and conservation. Includes calendar of events, contacts, membership information, photo album and projects.
- http://www.caves.org/grotto/baltimore/

Vermont Cavers Association
- Based in Rutland and a chapter of the National Speleological Association. Dedicated to study and exploration. Includes Constitution and Bylaws, photos, meeting and contact information.
- http://www.caves.org/grotto/vca/

District of Columbia Grotto of the National Speleological Society
- Founded in 1939 and dedicated to exploration, study and conservation. Includes calendar of events, project list, safety and equipment tips, meeting, membership and contact information.
- http://www.caves.org/grotto/dcg/

Boston Grotto
- Founded in 1952 to promote exploration, conservation, scientific studies and social activities. Includes contact information, trip calendar, newsletter, photo gallery and links.
- http://www.bostongrotto.org/

Dayton Underground Grotto
- Formed in 1992 for cave exploration and conservation. Includes calendar of events, contacts, newsletter, photos, library holdings and message board.
- http://www.dugcaves.com/

Northern Colorado Grotto
- Located in Fort Collins and affiliated with the National Speleological Society. Includes events, newsletter, and contacts.
- http://www.caves.org/grotto/northern_colorado/

Southern California Grotto
- Meets in Pasadena. NSS chaper is dedicated to surveying and mapping, exploration, and conservation. Includes meeting and membership information, newsletter and contacts.
- http://www.mindspring.com/~bszukalski/socalgrotto/socalgrotto.html

San Francisco Bay Chapter National Speleological Society
- Dedicated to exploration, study and conservation. Includes information about meetings, trips and events calendar, newsletter, projects, photos and contacts.
- http://www.caves.org/grotto/sfbc/

San Diego Grotto
- Activities include exploration, surveying and conservation in California, Arizona, Nevada and New Mexico. Has meeting information, photos, maps and links.
- http://www.sdgrotto.com/

Diablo Grotto
- Located in the San Francisco Bay Area. Includes information about membership, meetings, trips, training sessions and projects.
- http://www.museumca.org/diablo/

Gem State Grotto
- Located in Boise, Idaho and affiliated with the National Speleological Society. Promotes exploration, study, conservation and restoration of caves. Includes schedule of events and contact information.
- http://www.gemstategrotto.org/

Karst Waters Institute
- Aiming to improve the fundamental understanding of karst water systems through sound scientific research and the education of professionals and the public.
- http://www.karstwaters.org/

American Cave Conservation Association Inc.
- Based in Horse Cave, Kentucky. Dedicated to preservation of karstlands. Includes membership application, volunteer projects, news, events and contacts.
- http://www.cavern.org

Cave Research Foundation
- Institutional member of the NSS. Involved with conservation, research and karst interpretation. Includes operation areas, programs and projects, publications, and membership information.
- http://www.cave-research.org/

Southwestern Region of the NSS
- Formed to further the discovery, exploration, scientific study and conservation of karst areas in New Mexico and Texas. Includes Constitution, upcoming events, newsletter and contacts.
- http://www.caves.org/region/swr/

Southeastern Regional Association
- SERA is an organization made up of the Alabama, Florida, Georgia, Mississippi, North Carolina, South Carolina, and Tennessee NSS regions, USA.
- http://www.caves.org/region/sera/

Northeastern Regional Organization
- Affiliated with the NSS and includes grottos in Pennsylvania, New York, New England and Eastern Canada. Includes newsletter, Constitution, meeting and contact information.
- http://www.caves.org/region/nro/

NSS Vertical Section
- Seeks to develop, educate, and train cavers in safe and efficient vertical rope techniques.
- http://www.caves.org/section/vertical/

NSS Survey and Cartography Section
- Information on mapping and documenting caves, data management and archiving, and all forms of cave cartography.
- http://www.caves.org/section/sacs/

NSS Paleontology Section
- National Speleological Society organization for cavers interested in the study of fossils featured.
- http://www.caves.org/section/paleo/

NSS Human Sciences Section
- Details the study of cavers and their interactions with each other and with caves.
- http://www.caves.org/section/hss/

NSS Communications and Electronics Section
- Offers a forum for those cavers interested in cave radio and electronic gadgetry. Includes articles, newsletter, membership requirements and contact information.
- http://www.caves.org/section/commelect/

NSS Video Section
- Offers help in using camcorders, lighting systems, editing setups, and computer technology in cave-related presentations. Includes newsletter, membership and meeting information.
- http://www.caves.org/section/video/