Coalville: Manganite & Psilomelane Rockhounding in Summit County, Utah

Updated June 2026

Coalville is a mapped rockhounding spot in Summit County, Utah. Reported finds include manganite, psilomelane, pyrolusite, sulfur. Below: coordinates, access notes, nearby spots, and trip-planning links.

Quick details

Access: Public area
County: Summit County
State: Utah
Coordinates: 40.91888, -111.42174

Geology at Coalville

This spot sits on ground mapped as Older alluvial-fan and debris-fan deposits that formed within roughly the last 3 million years. Loose deposits like these are float-collecting ground: erosion keeps moving durable rocks and minerals into gravel bars, cutbanks, and washes.

Mapped unit: Older alluvial-fan and debris-fan deposits
Age: 3 Ma to present (Pleistocene)
Elevation: 5,790 ft

Geologic mapping via Macrostrat and the underlying state geological survey maps (CC BY 4.0). Bedrock at the surface can vary within a mapped unit.

Best time to visit Coalville

Best months: March to November. Typical highs run 88°F in midsummer and 38°F in midwinter, with winter lows near 12°F.

Climate normals: NOAA 1991-2020 monthlies, COALVILLE station (1 mi away), adjusted for elevation.

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 Coalville

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 Coalville.

Across the state line from Coalville

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

Coalville FAQ

Where is Coalville?+

Coalville is in Summit County, Utah, at 40.91888, -111.42174.

What rocks and minerals can you find at Coalville?+

Coalville is reported to produce Manganite, Psilomelane, Pyrolusite, Sulfur.

Is collecting allowed at Coalville?+

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.

What tools should I bring to Coalville?+

A rock hammer, sturdy gloves, safety glasses, and a collecting bag cover the basics here. Add a spray bottle: wet rock shows color and pattern that dry rock hides.

When is the best time to visit Coalville?+

The most comfortable months at Coalville are March to November.

How do I get to Coalville?+

Open the directions link to navigate to 40.91888, -111.42174 in Google Maps. Some spots are remote, so check road conditions before driving out.

More rockhounding in Utah

See all 246 Utah spots →

Open Coalville on the map

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