Cedar City: Agate & Moss Agate Rockhounding in Iron County, Utah

Plan your visit

Generally open to casual rockhounding

County

Iron County

State

Utah

Nearest road

Cedar Canyon Road

Postcode

84721

Coordinates

37.65123, -112.97492

Coordinates are approximate. Confirm the exact ground in the RockHoundR app, where land overlays show which agency manages the area.

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.

Best time to visit Cedar City

Comfortable months (45 to 90°F highs)

Best months: March to November. Typical highs run 85°F in midsummer and 42°F in midwinter, with winter lows near 19°F.

Climate normals: NOAA 1991-2020 monthlies, CEDAR CITY 5E station (1 mi away), adjusted for elevation.

Geology at Cedar City

This spot sits on Tropic Shale and Dakota Formations, undivided, mapped as fg to mg sandstone, siltstone, mudstone, and shale that formed roughly 100 to 90 million years ago. Sedimentary beds like these are the typical host for petrified and silicified wood, which weathers out as durable float on slopes and in washes.

Mapped unit

Tropic Shale and Dakota Formations, undivided

Age

100–90 Ma (Late Cretaceous)

Rock types

fg to mg sandstone, siltstone, mudstone, and shale

Elevation

6,680 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.

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