Mud Springs Mountains: Agate & Opalized Wood Rockhounding in Sierra County, New Mexico

Updated June 2026

Mud Springs Mountains is a mapped rockhounding spot in Sierra County, New Mexico. Reported finds include agate, opalized wood, silicified wood, petrified palm. Below: coordinates, access notes, nearby spots, and trip-planning links.

Quick details

Access: Public area
County: Sierra County
State: New Mexico
Coordinates: 33.16648, -107.29755

Geology at Mud Springs Mountains

This spot sits on ground mapped as shale, limestone, and mixed clastic that formed roughly 325 to 300 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.

Age: 325–300 Ma (Pennsylvanian)
Rock types: shale, limestone, and mixed clastic
Elevation: 4,980 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 Mud Springs Mountains

Best months: September to May. Typical highs run 95°F in midsummer and 56°F in midwinter, with winter lows near 25°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, TRUTH OR CONSEQUENCES station (4 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 Mud Springs 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 Mud Springs Mountains.

Mud Springs Mountains FAQ

Where is Mud Springs Mountains?+

Mud Springs Mountains is in Sierra County, New Mexico, at 33.16648, -107.29755.

What rocks and minerals can you find at Mud Springs Mountains?+

Mud Springs Mountains is reported to produce Agate, Opalized Wood, Silicified Wood, Petrified Palm.

Is collecting allowed at Mud Springs 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 Mud Springs 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 Mud Springs Mountains?+

The most comfortable months at Mud Springs Mountains are September 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 Mud Springs Mountains?+

Open the directions link to navigate to 33.16648, -107.29755 in Google Maps. Some spots are remote, so check road conditions before driving out.

More rockhounding in New Mexico

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Open Mud Springs Mountains on the map

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