Skip to main content
U.S. flag

An official website of the United States government

Caves and Karst related content.

National Cave and Karst Program on National Forest System Lands

Publication cover.

Effective beginning 6/02/2025

This website, and all linked websites under the control of the agency is under review and content may change.

The goal of the U.S. Department of Agriculture, Forest Service, National Cave and Karst Program is to protect and maintain the biologic, geologic, mineralogic, paleontologic, hydrologic, cultural, educational, scientific, and recreational values of caves and karst resources.

#CavesAndKarst, #Science, #Conservation

Crawling in caves

Illustration of a cave with insects, a frog, bats and a sign that reads “home sweet home”.
Join us in Nature’s ultimate crawlspace. (USDA Forest Service illustration by John Eudicone) *Listen to the audio story: Forest Focus Episode 44: Crawling in CavesThere are portals within many national forests that offer entry into underground realms of the most curious forms of biodiversity…
#CavesAndKarst, #PacificSouthwestRegion, #LassenNationalForest

Significant Caves Designation Call for National Forest System Lands

USFS shield
By Limaris (Lima) Soto. The United States Department of Agriculture’s Forest Service manages diverse cave and karst resources across the national forests and grasslands. The Forest Service has responsibility under the Federal Cave Resources Protection Act of 1988 to designate significant caves and provide…
#Recreation, #MineralsAndGeologyManagement, #CavesAndKarst, #Caving, #Policy, #Conservation

Bridge to an icy wonderland reopened

An aerial image of the newly repaired Big Four Ice Caves bridge spanning the South Fork Stillaguamish river.  Heavily wooded forest appears on both sides of the bridge and river.
A repaired Big Four Ice Caves Bridge re-opened bigger and better in October 2022—extending 37 feet longer—to stabilize it on the South Fork Stillaguamish riverbank. The $241,000 project, contracted to One Corner Construction, was funded through the Great American Outdoor Act. (Forest Service…
#IceCaves, #GreatAmericanOutdoorsAct, #Bridges, #CavesAndKarst, #Recreation

Badland caves are cooler than you think

Two forest service employees take a break on the hills
Darley Newman and her guide Forest Service employee, Treva Slaughter, navigate the endless horizons of the Little Missouri National Grassland. (Photo credit: Darley Newman) America’s national forests and grasslands are popular destinations for recreational activities like swimming, hiking and rock climbing…
#IceCaves, #Grasslands, #CavesAndKarst, #Geology, #Recreation

La Garita Mountains grew from volcanic explosions 35 million years ago

A photo of the The Wheeler Geologic Area on the Rio Grande National Forest.
The Wheeler Geologic Area on the Rio Grande National Forest offers a glimpse into a violent volcanic past with hoodoos and multi-colored tuff that has been slowly eroding for millions of years. (USDA Forest Service Photo by Michael Blakeman) Looking out over the La Garita Wilderness Area in Southwest…
#Volcanos, #CavesAndKarst, #Caving, #MineralsAndGeologyManagement, #Minerals