Fairfield: Chalcedony & Chert Rockhounding in Utah County, Utah

Updated June 2026

Fairfield is a mapped rockhounding spot in Utah County, Utah. Reported finds include chalcedony, chert, limonite, pyrite, quartz, and more. Below: coordinates, access notes, nearby spots, and trip-planning links.

Quick details

Access: Public area
County: Utah County
State: Utah
Nearest road: Lewiston Road
Coordinates: 40.27360, -112.14522

Geology at Fairfield

This spot sits on Alluvium and colluvium, mapped as unconsolidated alluvium and colluvium that formed within roughly the last 3 million years. Gravels like these concentrate whatever survives the river: agate, jasper, and other tough silica typically show up as rounded, waxy stones.

Mapped unit: Alluvium and colluvium
Age: 3 Ma to present (Quaternary)
Rock types: unconsolidated alluvium and colluvium
Elevation: 5,340 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 Fairfield

Best months: March to November. Typical highs run 89°F in midsummer and 38°F in midwinter, with winter lows near 12°F.

Climate normals: NOAA 1991-2020 monthlies, FAIRFIELD 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 Fairfield

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 Fairfield.

Fairfield FAQ

Where is Fairfield?+

Fairfield is in Utah County, Utah, at 40.27360, -112.14522. Nearest road: Lewiston Road.

What rocks and minerals can you find at Fairfield?+

Fairfield is reported to produce Chalcedony, Chert, Limonite, Pyrite, Quartz, Variscite, Fossils.

Is collecting allowed at Fairfield?+

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 Fairfield?+

Most agate and jasper is surface float: bring a spray bottle, a pick or small shovel, and a sturdy bag. Wet stones show their banding and translucence.

When is the best time to visit Fairfield?+

The most comfortable months at Fairfield are March to November.

How do I get to Fairfield?+

Open the directions link to navigate to 40.27360, -112.14522 in Google Maps. The nearest road is Lewiston Road.

More rockhounding in Utah

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Open Fairfield on the map

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