Thoreau: Amber Rockhounding in McKinley County, New Mexico

Updated June 2026

Thoreau is a mapped rockhounding spot in McKinley County, New Mexico. Reported finds include amber. Below: coordinates, access notes, nearby spots, and trip-planning links.

Quick details

Access: Public area
County: McKinley County
State: New Mexico
Postcode: 87045
Coordinates: 35.44349, -108.12812

Geology at Thoreau

This spot sits on San Rafael Group, mapped as sandstone and siltstone that formed roughly 175 to 160 million years ago. Sedimentary rock like this erodes unevenly, so the most productive collecting is typically along fresh cuts, badland slopes, and active drainages.

Mapped unit: San Rafael Group
Age: 175–160 Ma (Middle Jurassic)
Rock types: sandstone and siltstone
Elevation: 7,310 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 Thoreau

Conditions here are workable year-round, with typical highs from 48°F in winter to 89°F in summer. At about 7,310 ft, snow can block access from late fall well into spring, so check conditions outside of summer.

Climate normals: NOAA 1991-2020 monthlies, THOREAU 12 SE station (10 mi away).

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 Thoreau

Each chip opens all spots that produce that material; the encyclopedia link opens the full ID and field guide.

Amber Encyclopedia →

Nearby rockhounding spots

Other rockhounding spots within driving distance of Thoreau.

Thoreau FAQ

Where is Thoreau?+

Thoreau is in McKinley County, New Mexico, at 35.44349, -108.12812.

What rocks and minerals can you find at Thoreau?+

Thoreau is reported to produce Amber.

Is collecting allowed at Thoreau?+

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 Thoreau?+

A rock hammer, sturdy gloves, safety glasses, and a collecting bag cover the basics here. Add a spray bottle: wet rock shows color and pattern that dry rock hides.

When is the best time to visit Thoreau?+

Thoreau is workable year-round. At about 7,310 ft, snow can block access from late fall well into spring, so check conditions outside of summer.

How do I get to Thoreau?+

Open the directions link to navigate to 35.44349, -108.12812 in Google Maps. Some spots are remote, so check road conditions before driving out.

More rockhounding in New Mexico

See all 119 New Mexico spots →

Open Thoreau on the map

Use the RockHoundR app for live land overlays, weather, geology, directions, and saved finds.