Rockhounding in Larimer County, Colorado

5 mapped rockhounding spots in Larimer County. Most commonly produces beryl, agate, allophane, aquamarine.

Larimer County rockhounding photos

Representative spot and material photos from this county, shown where verified public image records are available.

1 photo

Green beryl crystals in pegmatite, like the beryl and aquamarine at Crystal Mountain — Crystal MountainLarimer County, Colorado

Minerals reported in Larimer County

Beryl2
Agate1
Allophane1
Aquamarine1
Bismutite1
Calcite1
Chalcopyrite1
Chrysoberyl1

Standout in Larimer County

Hand-picked spot in Larimer County, chosen for unusual mineralogy or documented public access. Each card opens the full coordinates and access notes.

Top pick
Crystal Mountain
Public
Larimer County
The Crystal Mountain pegmatite district, mapped in USGS Bulletin 1011, contains beryl in roughly a quarter of its pegmatites, including aquamarine, alongside muscovite, fluorapatite, and bismutite. The district sits on Roosevelt National Forest along upper Buckhorn Creek west of Fort Collins. Garnet and schorl tourmaline occur in the zoned pegmatites.
Beryl, Aquamarine, Fluorapatite, Muscovite

Spots in Larimer County

Spot	Minerals	Coordinates	Access
Crystal MountainNorth Crystal Mountain Road	Beryl Aquamarine Fluorapatite Muscovite Bismutite	40.5418, -105.4114	Public
Diamond Peak	Diamond	40.9802, -105.5594	Public
Howes Gulch MinesClear Ridge Road	Chalcopyrite Gold Pyrite Copper	40.5911, -105.2250	Public
Specimen Mountain	Allophane Calcite Agate Quartz Topaz	40.4428, -105.8084	Permission
Wisdom RanchParadise Park Road	Beryl Chrysoberyl Garnet Graphic Granite	40.5978, -105.3644	Public

Neighboring counties in Colorado

Adjacent rockhounding counties, ranked by how close their centroids sit to Larimer County. A natural extension if Larimer County is already on your trip plan.

Across the state line from Larimer County

Rockhounding counties in neighboring states within driving range. Geology rarely respects state borders — these are often the closest mapped spots you can reach without going deeper into Colorado.

Larimer County FAQ

Where can I rockhound in Larimer County, Colorado?+

RockHoundR tracks 5 rockhounding spots in Larimer County. Each entry below has coordinates, mineral notes, and access type. Always confirm local rules before collecting.

What rocks and minerals are common in Larimer County?+

Spots in Larimer County most often produce Beryl, Agate, Allophane, Aquamarine, Bismutite. Individual spots can vary widely.

Are these Larimer County rockhounding spots on public land?+

Most spots in this list are tagged public, but access can change with seasons, claims, and local closures. Always verify before driving out — links in the app open the right BLM, USFS, or county pages.

Plan a Larimer County rockhounding trip

Open RockHoundR to see these spots on the map alongside land overlays, weather, geology, and your saved finds.