Rockhounding in New Mexico, from Rockhound State Park to BLM land
Updated
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New Mexico gives rockhounds three kinds of ground with three different answers. Bureau of Land Management (BLM) land, about 13.5 million acres, and national forest, about 9.2 million, allow hobby collecting in reasonable or small amounts. State trust land is closed to recreation without a State Land Office permit, and the permit rule says nothing about rocks. And New Mexico has a state park built for collectors: at the rockhound unit of Rockhound State Park, the state's rule allows collecting in posted areas, with small hand tools, for souvenirs only. This page sets out each rule as the agency publishes it and whom to ask.
Who manages New Mexico
Federal agencies manage 31.6 percent of New Mexico (Congressional Research Service, data as of September 30, 2024) [1].
| Manager | Acres | First thing to know |
|---|---|---|
| BLM | 13,491,010 | Reasonable amounts, noncommercial, hand tools and metal detectors |
| Forest Service | 9,229,797 | Small personal amounts, no mechanical equipment |
| Defense | 1,055,589 | Military ranges; closed unless the installation allows access |
| National Park Service | 472,925 | Essentially closed to collecting |
| Fish and Wildlife Service | 332,058 | Refuge rules |
New Mexico's Defense acreage is second only to California's in the report [1]. See refuges, reservoirs and military land.
Rockhound State Park: the rule word for word
New Mexico's state park rules are in Title 19, Chapter 5, Part 2 of the New Mexico Administrative Code. Section 19.5.2.25 NMAC, Rock Collecting, as amended effective January 1, 2025, reads [2]:
- A. "Rock collecting is permissible in areas designated by the secretary and posted at the rockhound unit of Rockhound state park."
- B. "Rocks removed from Rockhound state park shall be as souvenirs only, not for resale, trade or commercial use."
- C. "Rock collecting is limited to small hand tools only." "The following are prohibited: mechanical or motorized tools and equipment, tools with a handle longer than 12 inches, wheeled devices such as wheelbarrows, carts or wagons."
What that means in practice:
| You may | You may not |
|---|---|
| Collect in the posted areas of the rockhound unit | Collect elsewhere in the park, or in other state parks under this section |
| Use a rock hammer, small pick or trowel with a handle 12 inches or shorter | Bring a long-handled pick or shovel, any power tool, or a wheelbarrow, cart or wagon |
| Take rocks home as souvenirs | Sell, trade or use them commercially |
The rule sets no weight or quantity limit [2]. Ask the park whether it posts one, and take only what you will keep. Because rocks from the park may not be resold, they cannot become dealer stock; what can is covered on what makes stock lawful.
The rule's history shows it replaced former 19.5.2.23 NMAC in 2008, took its current number in 2013 and was last amended in the New Mexico Register of December 10, 2024 [2].
State trust land: a permit to enter, nothing on rocks
The New Mexico State Land Office manages state trust land. Its rule, 19.2.19.9 NMAC, is titled "Recreational access prohibited without a permit" and says: "Recreational access to state trust lands is prohibited in the absence of a recreational access permit" or other "express, written authorization from the commissioner" [3]. Access under an easement issued to the state game commission needs no additional permit, and you must show your authorization when a State Land Office employee or lessee asks [3]. The Justia text is current through June 24, 2025 [3].
The section does not mention rocks, minerals or collecting [3]. A recreational access permit gets you onto the land; nothing in the rule read for this page says it lets you take anything. Ask the State Land Office in writing before you collect on trust land.
BLM and national forest land
On BLM land the regulation allows "reasonable amounts" of "rocks, mineral specimens, and semiprecious gemstones" for noncommercial purposes, except on developed recreation sites or where collecting is "otherwise prohibited and posted," without "explosive, motorized or mechanical devices, except metal detectors" [4]. Collecting for sale needs a contract or permit [4]. No pound limit appears in the regulation; see collecting on BLM land. National forest rules are on collecting in national forests.
BLM, trust and private land can meet without a fence. Check status at the exact spot using finding out who manages a parcel.
National parks and monuments, tribal and pueblo land
National Park Service units in New Mexico follow the federal park rule (national parks and monuments). Monuments managed by BLM or the Forest Service follow their own management plans; ask the monument office. Tribal and pueblo land is governed by each nation; none of the sources here grants collecting rights there.
Confirm with the New Mexico offices
Last verified October 2026. Before a trip, confirm with:
- New Mexico State Parks, Rockhound State Park: ask which areas are posted open and whether any quantity limit applies, under 19.5.2.25 NMAC [2].
- New Mexico State Land Office, under 19.2.19.9 NMAC: ask in writing whether your permit allows any collecting [3].
- BLM New Mexico field office or the Forest Service ranger district, for closures and claims [4].
If the park is your first trip, pack with the 12 inch handle rule in mind; what to bring on a first trip covers the rest.
References
- Congressional Research Service, *Federal Land Ownership: Overview and Data*, R42346, updated September 14, 2026 (data as of September 30, 2024), Table 2. https://www.everycrsreport.com/files/2026-09-14_R42346_c4220347ac982efb0aebb44f2a7db48e961ec900.pdf
- N.M. Admin. Code 19.5.2.25, Rock Collecting (Cornell LII, version effective January 1, 2025). https://www.law.cornell.edu/regulations/new-mexico/N-M-Admin-Code-SS-19.5.2.25_v2
- N.M. Admin. Code 19.2.19.9, Recreational Access Prohibited Without a Permit (Justia, current through June 24, 2025). https://regulations.justia.com/states/new-mexico/title-19/chapter-2/part-19/section-19-2-19-9
- 43 CFR 8365.1-5, Property and resources (Cornell LII, read October 2026). https://www.law.cornell.edu/cfr/text/43/8365.1-5
