SE Grand County: Agate & Chalcedony Rockhounding in Grand County, Utah

Updated June 2026

SE Grand County is a mapped rockhounding spot in Grand County, Utah. Reported finds include agate, chalcedony, chert, silicified dinosaur bone, petrified wood. Below: coordinates, access notes, nearby spots, and trip-planning links.

Quick details

Access: Permission required
County: Grand County
State: Utah
Coordinates: 38.65118, -109.55715

Geology at SE Grand County

This spot sits on ground mapped as Navajo Sandstone that formed roughly 200 to 175 million years ago. Sedimentary layers like these are where fossils are typically preserved, and fresh exposures after rain or in active cuts tend to produce best.

Mapped unit: Navajo Sandstone
Age: 200–175 Ma (Early Jurassic)
Elevation: 4,610 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 SE Grand County

Best months: February to May. Typical highs run 97°F in midsummer and 40°F in midwinter, with winter lows near 20°F. Summer heat here is intense, so carry more water than you think you need and work the early morning.

Climate normals: NOAA 1991-2020 monthlies, ARCHES NP HQS station (4 mi away), adjusted for elevation.

Land & collecting status

Permission required before collecting

Requires landowner or agency permission before any collecting. Do not enter without explicit authorization.

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 SE Grand County

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 SE Grand County.

SE Grand County FAQ

Where is SE Grand County?+

SE Grand County is in Grand County, Utah, at 38.65118, -109.55715.

What rocks and minerals can you find at SE Grand County?+

SE Grand County is reported to produce Agate, Chalcedony, Chert, Silicified Dinosaur Bone, Petrified Wood.

Is collecting allowed at SE Grand County?+

Permission required before collecting. Requires landowner or agency permission before any collecting. Do not enter without explicit authorization. Always confirm current rules with the managing agency before a trip.

What tools should I bring to SE Grand County?+

A rock hammer, a cold chisel, safety glasses, and newspaper or foam for wrapping finds cover most fossil ground. A trowel and a sieve help in soft exposures.

When is the best time to visit SE Grand County?+

The most comfortable months at SE Grand County are February to May. Summer heat here is intense, so carry more water than you think you need and work the early morning.

How do I get to SE Grand County?+

Open the directions link to navigate to 38.65118, -109.55715 in Google Maps. Some spots are remote, so check road conditions before driving out.

More rockhounding in Utah

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Open SE Grand County on the map

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