Boulder Mountains — Rockhounding in Garfield County, Utah

Boulder Mountains is a mapped rockhounding spot in Garfield County, Utah. Reported finds include pyrolusite. Below: coordinates, access notes, nearby spots, and trip-planning links.

Quick details

Access: Public area
County: Garfield County
State: Utah
Nearest road: Tantalus Flat Road
Coordinates: 38.09970, -111.33069

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.

State guidance last verified: April 1, 2026

BLM Utah — Rockhounding overview
Utah Geological Survey — collecting guidelines
SITLA — surface use rules
Community submissions reviewed against published agency rules

Found at Boulder Mountains

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

Pyrolusite Encyclopedia →

Nearby rockhounding spots

Other rockhounding spots within driving distance of Boulder Mountains.

Boulder Mountains FAQ

Where is Boulder Mountains?+

Boulder Mountains is in Garfield County, Utah, at 38.09970, -111.33069. Nearest road: Tantalus Flat Road.

What rocks and minerals can you find at Boulder Mountains?+

Boulder Mountains is reported to produce Pyrolusite.

Is collecting allowed at Boulder Mountains?+

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 Boulder Mountains?+

Open the directions link to navigate to 38.09970, -111.33069 in Google Maps. The nearest road is Tantalus Flat Road.

More rockhounding in Utah

See all 246 Utah spots →

Open Boulder Mountains on the map

Use the RockHoundR app for live land overlays, weather, geology, directions, and saved finds.