Best spot

Marysville: Cinnabar & Alunite Rockhounding in Piute County, Utah

Updated June 2026

Marysvale earns a top spot for small but well-formed crystals in rhyolite cavities, especially bixbyite, amethyst, and reported rutile or pseudobrookite. UGS describes the occurrence as BLM public land in a mid-Tertiary volcanic field, and Mindat records the same locality north of Marysvale with bixbyite, amethyst, pseudobrookite, and rutile. Reported finds include cinnabar, alunite, albite, biotite, calcite, and more. Below: coordinates, access notes, nearby spots, and trip-planning links.

Marysville photos

Public image records connected to this spot or its reported material.

1 photo

Big Rock Candy Mountain, hydrothermally altered volcanic rock along Route 89, at Marysville, Piute County, Utah

Quick details

Access: Public area
County: Piute County
State: Utah
Nearest road: West Bullion Avenue
Postcode: 84750
Coordinates: 38.44940, -112.23038

Geology at Marysville

This spot sits on Alluvium and colluvium, mapped as unconsolidated alluvium and colluvium 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: Alluvium and colluvium
Age: 3 Ma to present (Quaternary)
Rock types: unconsolidated alluvium and colluvium
Elevation: 5,880 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 Marysville

Best months: February to November. Typical highs run 89°F in midsummer and 43°F in midwinter, with winter lows near 16°F.

Climate normals: NOAA 1991-2020 monthlies, MARYSVALE station (0 mi away).

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 Marysville

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 Marysville.

Marysville FAQ

Where is Marysville?+

Marysville is in Piute County, Utah, at 38.44940, -112.23038. Nearest road: West Bullion Avenue.

What rocks and minerals can you find at Marysville?+

Marysville is reported to produce Cinnabar, Alunite, Albite, Biotite, Calcite, Chlorite, Pyrolusite, Barite, Fluorite, Goethite, Amethyst, Quartz, Selenite, Opal.

Is collecting allowed at Marysville?+

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 Marysville?+

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 Marysville?+

The most comfortable months at Marysville are February to November.

How do I get to Marysville?+

Open the directions link to navigate to 38.44940, -112.23038 in Google Maps. The nearest road is West Bullion Avenue.

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