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Caves

Caves

What the grotto knows about the caves of Montana and Wyoming. Locations stay with the grotto.

5 more pages here for members. Join for $12 a year or sign in.

PhotographsPictures from underground, from every trip report.
Darby Canyon Ice CaveOne Teton cave with five names, and why it deserves respect.

Projects

Projects

The work the grotto does together, and how to get in on it.

Bighorn–Horsethief SurveyRemapping Montana's longest cave system, since 2021. Where the grotto is busiest.
Annual small grantUp to $500 a year for members doing cave research, conservation or education.
Winter alpine cavingStephen Gladieux's guide to caving the high country in winter.
Cave CampWorkshops and trips for every level, from the 2016 and 2017 camps.

Conservation

Conservation

Bats, closures and the law. The rules every trip goes by.

Closed cave listCaves closed for bats or by the owner. Check it before every trip.
White-nose syndromeThe disease killing bats, and how to clean your gear.
Report batsSaw bats underground? Tell us how many and what kind.
Federal Cave Resources Protection ActThe federal law, and why cave locations stay private.
Montana Cave Conservation ActMontana's own cave law.

News

News

What the grotto has been up to.

1 more page here for members. Join for $12 a year or sign in.

News and announcementsGrotto news, meetings and calls for help.
What's newEvery new trip report, photo and comment, newest first.
NewslettersNRMG News and The Darkside: every issue, back to 2000.

About

About

An all-volunteer NSS grotto covering Montana and northern Wyoming.

About the grottoWho we are, what we do, and how to come caving.
Meet the officersWho runs the grotto this year.
JoinMembership is for adults, $12 a year.
FAQsFirst trips, gear, and the questions everyone asks.
Annual meetingWhere officers are elected and the grotto votes.
Bylaws and standing rulesThe constitution the grotto runs by.
Document libraryMinutes, agreements and forms.
Contact usWrite to the officers.

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Northern Rocky Mountain Grotto

A grotto of the National Speleological Society, chartered in 2000. Discovering, exploring, surveying and protecting the caves of Montana and Wyoming.

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Conservation

Cave locations are protected under the Federal Cave Resources Protection Act and are never published.

© 2026 Northern Rocky Mountain Grotto · 501(c)(3) · Donate Cave softly. Leave no trace.

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