Alum Mountain — Rockhounding in Grant County, New Mexico
Alum Mountain is a mapped rockhounding spot in Grant County, New Mexico. Reported finds include geode, carnelian. Below: coordinates, access notes, nearby spots, and trip-planning links.
Map showing Alum Mountain in Grant County, New Mexico
Quick details
- Access
- Public area
- County
- Grant County
- State
- New Mexico
- Coordinates
- 33.13255, -108.21916
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:
- 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 Alum Mountain
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 Alum Mountain.
- Meerschaum area surfacesGrant County, New Mexico · 6 mi awayChert
- Sapillo CreekGrant County, New Mexico · 7 mi awayGeode, Carnelian
- Black MountainCatron County, New Mexico · 18 mi awayAlbite, Amethyst, Biotite
- GeorgetownGrant County, New Mexico · 23 mi awayArgentite, Descloizite
- Fort BayardGrant County, New Mexico · 23 mi awayCommon Opal, Fire Opal
- Santa RitaGrant County, New Mexico · 24 mi awayCopper, Cuprite, Molybdenite
- KingstonSierra County, New Mexico · 33 mi awayQuartz, Quartz Clusters
- Mimbres MountainsSierra County, New Mexico · 34 mi awayAgate, Chalcedony, Chert
Across the state line from Alum Mountain
Alum Mountain is close enough to the New Mexico border that the next-closest rockhounding spots are in a neighboring state. Worth knowing if you are already on the road.
- Both sides of Mule Creek RoadGreenlee County, Arizona · 49 mi awayChalcedony Geode
- York AreaTop pick in ArizonaGreenlee County, Arizona · 60 mi awayFire Agate, Banded Agate, Carnelian
- 1 mi. N of old Three-Way drive-in theaterTop pick in ArizonaGreenlee County, Arizona · 60 mi awayFire Agate, Chalcedony
- Foothills of Sunset PeakGreenlee County, Arizona · 61 mi awayAgate, Blue Jasper, Black Jasper
- N of Mulligan PeakGreenlee County, Arizona · 61 mi awayPurple Agate
- W of Mulligan PeakGreenlee County, Arizona · 61 mi awayNodules
Alum Mountain FAQ
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More rockhounding in New Mexico
See all 119 New Mexico spots →Open Alum Mountain on the map
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