Best spot

Zuni Mountains: Agate & Chalcedony Rockhounding in Cibola County, New Mexico

Updated June 2026

The Zuni Mountains give New Mexico's top ten a western forest-and-public-land agate field rather than another southern mining district. The candidate data's agate, chalcedony, jasper, and petrified wood suite aligns with New Mexico Bureau of Geology rockhound guidance and published Rockhounding New Mexico locality coverage for the Gallup, Grants, and Zuni Mountains region. Reported finds include agate, chalcedony, jasper, petrified wood. Below: coordinates, access notes, nearby spots, and trip-planning links.

Zuni Mountains photos

Public image records connected to this spot or its reported material.

2 photos

Quick details

Access: Public area
County: Cibola County
State: New Mexico
Nearest road: County Road 149
Coordinates: 35.14220, -108.32580

Geology at Zuni Mountains

This spot sits on San Andres Formation, mapped as limestone and dolostone that formed roughly 290 to 260 million years ago. Carbonate rock like this dissolves and weathers readily, so fresh road cuts, quarries, and creek exposures are typically the most productive ground.

Mapped unit: San Andres Formation
Age: 290–260 Ma (Cisuralian to Guadalupian)
Rock types: limestone and dolostone
Elevation: 7,700 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 Zuni Mountains

Best months: February to November. Typical highs run 83°F in midsummer and 42°F in midwinter, with winter lows near 12°F. At about 7,700 ft, snow can block access from late fall well into spring, so check conditions outside of summer.

Climate normals: NOAA 1991-2020 monthlies, EL MORRO NATL MON station (7 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

Rockhound State Park — Collection rules
BLM New Mexico
New Mexico Bureau of Geology and Mineral Resources
Community submissions reviewed against published agency rules

Found at Zuni Mountains

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 Zuni Mountains.

Zuni Mountains FAQ

Where is Zuni Mountains?+

Zuni Mountains is in Cibola County, New Mexico, at 35.14220, -108.32580. Nearest road: County Road 149.

What rocks and minerals can you find at Zuni Mountains?+

Zuni Mountains is reported to produce Agate, Chalcedony, Jasper, Petrified Wood.

Is collecting allowed at Zuni Mountains?+

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 Zuni Mountains?+

A rock hammer, sturdy gloves, and a padded bag cover petrified wood hunting. Most pieces are surface float, so walking slopes and washes beats digging.

When is the best time to visit Zuni Mountains?+

The most comfortable months at Zuni Mountains are February to November. At about 7,700 ft, snow can block access from late fall well into spring, so check conditions outside of summer.

How do I get to Zuni Mountains?+

Open the directions link to navigate to 35.14220, -108.32580 in Google Maps. The nearest road is County Road 149.

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