Mayfield: Anhydrite & Gypsum Rockhounding in Sanpete County, Utah

Updated June 2026

Mayfield is a mapped rockhounding spot in Sanpete County, Utah. Reported finds include anhydrite, gypsum, halite. Below: coordinates, access notes, nearby spots, and trip-planning links.

Quick details

Access: Public area
County: Sanpete County
State: Utah
Coordinates: 39.10956, -111.72808

Geology at Mayfield

This spot sits on ground mapped as Intrusive masses of the Arapien Shale that formed within roughly the last 175 million years. Plutonic rock like this weathers slowly into grus and boulders, and the most productive collecting is typically in weathered zones and drainages.

Mapped unit: Intrusive masses of the Arapien Shale
Age: 175 Ma to present (Middle Jurassic to Quaternary)
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 Mayfield

Best months: March to November. Typical highs run 87°F in midsummer and 38°F in midwinter, with winter lows near 18°F.

Climate normals: NOAA 1991-2020 monthlies, MANTI station (12 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 Mayfield

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 Mayfield.

Mayfield FAQ

Where is Mayfield?+

Mayfield is in Sanpete County, Utah, at 39.10956, -111.72808.

What rocks and minerals can you find at Mayfield?+

Mayfield is reported to produce Anhydrite, Gypsum, Halite.

Is collecting allowed at Mayfield?+

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 Mayfield?+

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 Mayfield?+

The most comfortable months at Mayfield are March to November.

How do I get to Mayfield?+

Open the directions link to navigate to 39.10956, -111.72808 in Google Maps. Some spots are remote, so check road conditions before driving out.

More rockhounding in Utah

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Open Mayfield on the map

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