Fillmore: Anhydrite & Gypsite Rockhounding in Millard County, Utah

Updated June 2026

Fillmore is a mapped rockhounding spot in Millard County, Utah. Reported finds include anhydrite, gypsite, gypsum, niter. Below: coordinates, access notes, nearby spots, and trip-planning links.

Quick details

Access: Public area
County: Millard County
State: Utah
Nearest road: Chalk Creek Canyon Road
Coordinates: 38.95248, -112.26046

Geology at Fillmore

This spot sits on ground mapped as Alluvium, late Holocene that formed within roughly the last 12,000 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, late Holocene
Age: < 1 Ma (Holocene)
Elevation: 5,600 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 Fillmore

Best months: March to November. Typical highs run 87°F in midsummer and 36°F in midwinter, with winter lows near 19°F.

Climate normals: NOAA 1991-2020 monthlies, FILLMORE station (3 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 Fillmore

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 Fillmore.

Fillmore FAQ

Where is Fillmore?+

Fillmore is in Millard County, Utah, at 38.95248, -112.26046. Nearest road: Chalk Creek Canyon Road.

What rocks and minerals can you find at Fillmore?+

Fillmore is reported to produce Anhydrite, Gypsite, Gypsum, Niter.

Is collecting allowed at Fillmore?+

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 Fillmore?+

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 Fillmore?+

The most comfortable months at Fillmore are March to November.

How do I get to Fillmore?+

Open the directions link to navigate to 38.95248, -112.26046 in Google Maps. The nearest road is Chalk Creek Canyon Road.

More rockhounding in Utah

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Open Fillmore on the map

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