Can I take a rock from a national park or national monument?

In a national park, almost never. Federal park regulations prohibit removing or disturbing any mineral resource, fossil or archaeological item in a unit of the National Park System, and they forbid possessing a metal detector there as well [1]. The National Park Service lists only three narrow exceptions: limited gold panning at Whiskeytown, some surface collecting in some Alaska park units, and catlinite quarrying by American Indians at Pipestone [2]. A national monument is different, because it may be run by the Bureau of Land Management (BLM) or the Forest Service instead of the Park Service. This page shows how to tell which you are in and what each manager allows.

What the park rule says

The rule is 36 CFR 2.1, which applies in every unit of the National Park System. Paragraph (a) opens: "Except as otherwise provided in this chapter, the following is prohibited:" and the first item on the list is "Possessing, destroying, injuring, defacing, removing, digging, or disturbing from its natural state:" followed by plants, wildlife and these two items that matter to a rockhound [1]:

(iii) Nonfossilized and fossilized paleontological specimens, cultural or archeological resources, or the parts thereof. (iv) A mineral resource or cave formation or the parts thereof. [1]

Read closely, that covers more than taking. Possessing and disturbing are prohibited too, so turning over rocks to dig for crystals, or keeping a pebble someone else picked up, falls under the same paragraph.

Two other paragraphs of the same section close the usual loopholes:

• Metal detectors. Paragraph (a)(7) prohibits "Possessing or using a mineral or metal detector, magnetometer, side scan sonar, other metal detecting device, or subbottom profiler" and sets out narrow exceptions, among them detectors "used for authorized scientific, mining, or administrative activities" [1]. Leave the detector at home.
• What a superintendent may allow. Paragraph (c)(1) lets a superintendent designate "certain fruits, berries, nuts, or unoccupied seashells which may be gathered by hand for personal use or consumption" [1]. Rocks and minerals are not on that list, so a park's own rules cannot open general rock collecting under this paragraph.

The National Park Service summarizes the result in its own legal reference for geologic resources: the Organic Act directs it to conserve park resources, including rocks and minerals, "unless otherwise authorized by law," and 36 CFR 2.1 prohibits possessing, destroying or disturbing mineral resources in park units [2].

The word "park" in this rule means any unit the Park Service runs, whatever its title. National seashores, national lakeshores, national recreation areas, national historic sites and Park Service monuments are all park units for this purpose. A beach agate in a national seashore is a mineral resource under 36 CFR 2.1.

The three exceptions the Park Service lists

The NPS reference, current as of December 2023 and last updated January 2, 2024, names these exceptions [2]:

If you are not panning at Whiskeytown under its rule, collecting by hand in an Alaska unit where 13.35 applies, or an American Indian quarrying at Pipestone, the answer in a park unit is no. Read the special regulation itself before relying on the first two, and ask the park. The NPS reference directs detailed questions to its Geologic Resources Division [2].

National monuments: first find out who runs it

"National monument" is a designation, and Congress or the President can give it to land managed by several agencies. The managing agency's rule is the one that applies.

BLM monuments and "monument objects"

A presidential proclamation or act of Congress that creates a monument names the objects it protects: geological formations, fossils, archaeological sites and so on. The BLM's position is that its general rule (reasonable amounts of rocks, mineral specimens and semiprecious gemstones for noncommercial use, from 43 CFR 8365.1-5) still applies inside its monuments, except for those named objects and any closures in the management plan [3]. So the practical step is to read the proclamation and the monument's management plan, or ask the monument office, before you collect. The full BLM rule is on collecting on BLM land.

Not every BLM office says the same thing. The BLM Arizona rockhounding brochure (BLM/AZ/GI-14/009, which carries no printed date) states: "Collecting in BLM national monuments is prohibited" [5]. That is stricter than the national FAQ. In Arizona, follow the state office's brochure and confirm with the monument office; elsewhere, the national FAQ describes the starting point, and the monument plan and posted closures control.

Forest Service monuments

The Forest Service gives no general answer for its monuments and wilderness, only that collecting there "may or may not be allowed" and that you should check with the local ranger district [4]. The general national forest rules are on collecting in national forests.

Telling a park from a monument on the ground

Boundaries are rarely marked where you are standing. Do these before the trip:

1. Look up the unit by name. The Park Service publishes a website for every unit it runs. If the monument appears on nps.gov as a park, it is a park unit and 36 CFR 2.1 applies.
2. Check the land status map. The BLM's surface management maps show Park Service, BLM and Forest Service ground in different colors, so you can see where a park boundary meets BLM land. The method is on finding out who manages the ground you are standing on.
3. Ask at the visitor center or field office, and write down who told you what, and when.
4. Watch for the edge. Collecting areas often sit just outside park boundaries. Petrified wood is the classic case: none may be taken inside Petrified Forest National Park under 36 CFR 2.1, while BLM land outside follows the separate petrified wood free-use rule.

Fossils and artifacts in parks

The same paragraph (a)(1)(iii) bars removing "Nonfossilized and fossilized paleontological specimens, cultural or archeological resources, or the parts thereof" [1]. Fossils are also excluded from casual collecting on Park Service land by the separate federal fossil regulations, which are explained on collecting fossils on public land. Arrowheads and other artifacts have their own law, on arrowheads and other artifacts.

What to do in a park instead

You can still enjoy the geology. Photograph specimens in place, with a scale object and a note of where you stood; many collectors keep a photo record of park finds alongside their cabinet. Ask rangers about nearby BLM or national forest collecting areas, where the rules allow reasonable amounts. And practice the ethic every club teaches, set out on the rockhound's code of ethics: leave what is protected so the next visitor sees it too.

Where collecting is allowed next door

Most park visitors who want to collect end up on the BLM land or national forest beside the park. The first job is to find the boundary, which is what finding out who manages the ground you are standing on walks you through.

References

1. Legal Information Institute, Cornell Law School, 36 CFR 2.1 Preservation of natural, cultural and archeological resources (48 FR 30282, June 30, 1983, as amended through 87 FR 47319, Aug. 2, 2022), read October 22, 2026. https://www.law.cornell.edu/cfr/text/36/2.1
2. National Park Service, Geologic Resources Division, *Recreational Collection of Rocks and Minerals: Legal Instruments*, current as of December 2023, updated January 2, 2024. https://www.nps.gov/articles/recreational-collection-of-rocks-and-minerals-legal-instruments.htm
3. Bureau of Land Management, *Public Collection of Rocks, Mineral Specimens, and Semiprecious Gemstones on Public Lands for Noncommercial Purposes: FAQ*, file dated February 28, 2024. https://muleapi.blm.gov/sites/default/files/docs/2024-02/BLM-Rock-Collection-FAQs_2-28-24.pdf
4. USDA Forest Service, *Rockhounding Guide*, FS-1091, June 2017. https://www.fs.usda.gov/media/229394
5. Bureau of Land Management, Arizona, *Rockhounding in Arizona*, BLM/AZ/GI-14/009 (no printed date; web file dated 2018). https://BLM.GOV/sites/default/files/documents/files/2014%20Rockhounding_14_web_2018.pdf