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Mid-Appalachian Region of
the National Speleological Society


Last Updated: February 2024

Note: Organization publications are in italics
Pennsylvania Grottos
  Bald Eagle Grotto
Williamsport, PA
Founded 1986
NSS Grotto #320
Limestone Fever
  Bucks County Grotto
Warrington, PA
Founded 1980
NSS Grotto #272
Bucks County Diviner
  Franklin County Grotto
New Franklin, PA
Founded 1981
NSS Grotto #283
Cumberland Valley Caver
  Greater Allentown Grotto
Emmaus, PA
Founded 1980
NSS Grotto #273
Pack Rat Scat
  Huntingdon County Cave Hunters
Huntingdon, PA
Founded 1985
NSS Grotto #314
The Cave Hunter
  Loyalhanna Grotto
Apollo, PA
Founded 1987
NSS Grotto #327
Loyalhanna Troglodyte
  Nittany Grotto
Penn State University (PSU)
State College, PA
Founded 1948
NSS Grotto #014
Nittany Grotto News
  Out of Bounds Grotto
Muncy, PA
Founded 2021
NSS Grotto #486
The Out of Bounder
  Pennsylvania Inner-Earth Grotto
Indiana, PA
Founded 2003
NSS Grotto #444
P.I.G. Pen
  Philadelphia Grotto
Conshohocken, PA
Founded 1947
NSS Grotto #008
Philly Grotto News
  Pittsburgh Grotto
University of Pittsburgh
(Oakland Campus) Pittsburgh, PA
Founded 1947
NSS Grotto #011
Netherworld News
  Seven Valleys Grotto
Milroy/Lewistown, PA (Mifflin County)
Founded 1999
NSS Grotto #426
  York Grotto
York, PA
Founded 1959
NSS Grotto #092
York Grotto News
 Maryland Grottos
  Baltimore Grotto
University of Maryland Baltimore Campus (UMBC)
Catonsville, MD
Founded 1952
NSS Grotto #040
Baltimore Grotto News
  Federick Grotto
Frederick, MD
Founded 1975
NSS Grotto #226
Frederick Underground
  Sligo Grotto
Reisterstown, MD
Founded 1970
NSS Grotto #186
The Subterranean Sun
  Western Maryland Grotto
Cresaptown, MD
Founded 1983
NSS Grotto #294
Tite Times
 Delaware Grottos
  Commander Cody Caving Club
Deer Park Tavern
Newark, DE
Founded 1976
NSS Grotto #235
Commander Cody Chronicle
 New Jersey Grottos
  Central New Jersey Grotto
Hamilton Square, NJ
Founded 1978
NSS Grotto #252
Central New Jersey Caver
  NJ Tri-State Speleological Society
Wanaque, NJ
Founded 2001
NSS Grotto #436
  Northern New Jersey Grotto
Kinnelon, NJ
Founded 1952
NSS Grotto #037
Listing of Non-Active Grottos   -A list of non-active grottos within the Mid-Appalachian Region (MAR) that are chartered through the NSS but are currently no longer active or functioning.

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