Specimen Mountain — Rockhounding in Larimer County, Colorado

Specimen Mountain is a mapped rockhounding spot in Larimer County, Colorado. Reported finds include allophane, calcite, agate, quartz, topaz. Below: coordinates, access notes, nearby spots, and trip-planning links.

Quick details

Access: Public area
County: Larimer County
State: Colorado
Coordinates: 40.44276, -105.80841

Land & collecting status

Generally open to casual rockhounding

Most public-tagged spots sit on BLM, U.S. Forest Service, or other federal land where reasonable hand collecting of common rocks and minerals is allowed. Confirm posted rules and active mining claims before you dig.

Public-land rules vary by agency, season, and field office. The RockHoundR app pulls live BLM, USFS, NPS, and tribal overlays so you can see exactly which agency manages the ground at this spot.

Sources & verification

Spot details combine the public RockHoundR location dataset, normalized mineral labels, agency land-status checks in the app, and community submissions. Coordinates are approximate until verified in the field.

Sources: RockHoundR public spot dataset, app land overlays, and local agency review before each trip.

Found at Specimen Mountain

Each chip opens all spots that produce that material; the encyclopedia link opens the full ID and field guide.

Nearby rockhounding spots

Other rockhounding spots within driving distance of Specimen Mountain.

Across the state line from Specimen Mountain

Specimen Mountain is close enough to the Colorado border that the next-closest rockhounding spots are in a neighboring state. Worth knowing if you are already on the road.

Specimen Mountain FAQ

Where is Specimen Mountain?+

Specimen Mountain is in Larimer County, Colorado, at 40.44276, -105.80841.

What rocks and minerals can you find at Specimen Mountain?+

Specimen Mountain is reported to produce Allophane, Calcite, Agate, Quartz, Topaz.

Is collecting allowed at Specimen Mountain?+

Generally open to casual rockhounding. Most public-tagged spots sit on BLM, U.S. Forest Service, or other federal land where reasonable hand collecting of common rocks and minerals is allowed. Confirm posted rules and active mining claims before you dig. Always confirm current rules with the managing agency before a trip.

How do I get to Specimen Mountain?+

Open the directions link to navigate to 40.44276, -105.80841 in Google Maps. Some spots are remote — check road conditions before driving out.

More rockhounding in Colorado

See all 28 Colorado spots →

Open Specimen Mountain on the map

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