We are cavers. We are explorers. We are the
Northern Rocky Mountain Grotto

Welcome to the Northern Rocky Mountain Grotto website! We invite you to become part of our caving community. The NRMG is a recognized Internal organization of the National Speleological Society (NSS).

We are Montana’s only grotto!

Chartered in 2000, our purpose is to promote the discovery, exploration, scientific study, and conservation of caves and karst. Our club consists of members who actively survey, inventory, map, photograph, monitor, and recreate in caves in all parts of the state of Montana, Idaho, the Northern Rockies, Canada, and beyond! Although our core group is centralized in Montana, our membership is diverse and currently spreads across Washington, Idaho. Wyoming, Utah, Texas, and California! The NRMG is a unique club – we are very spread out,  yet somehow we’ve kept our club active and together for over 19 years!


The NRMG is 249 members strong!
Learn more About Us and Join the NRMG today.



Upcoming Events

Horsethief Cave Resurvey

Horsethief Cave Resurvey

Begins:
May 21, 2022
Ends:
May 22, 2022
Horsethief Cave Resurvey

Horsethief Cave Resurvey

Begins:
Jun 23, 2022
Ends:
Jun 26, 2022

Previous Events

Bozeman Pub Night

Bozeman Pub Night

Started:
Dec 7, 2021
Ended:
Dec 7, 2021
Horsethief Cave Resurvey

Horsethief Cave Resurvey

Started:
Nov 12, 2021
Ended:
Nov 14, 2021