Where can I go Geocaching on Federal lands?
Placing physical caches is not permitted in a park without the permission of the National Park Service. Existing physical caches are sponsored and maintained by the National Park Service. Unauthorized caches will be removed by park management.
The BLM usually welcomes this activity in appropriate locations when it is conducted with minimal impact to the environment. Contact a BLM land manager for permission before placing a cache.
Geocaching is not permitted in congressionally designated Wilderness Areas per FSM 2320, or in any other nationally designated areas such as national scenic areas, historic or scenic trails. However, according to the Forest Service website, geocaching is permissible in all other General Forest Areas provided there is no natural resource damage or vandalism to government facilities.
It is not permitted within areas designated as national historic landmarks, sites, or pre-historic sites.
When Geocaching, natural resources are not to be disturbed, nor are they allowed to be removed from NFS lands. That includes soil disturbance/digging, removal of vegetation, disturbance of natural features, etc. Avoid sensitive areas like wetlands or streams.
Geocachers are not required to have a permit provided that they are in-compliance with all other FS regulations and policy concerning group size and fees. Cache placers are asked to label geocaches as such to avoid any confusion or safety concerns.
Many state parks and state public lands also have their own policies regarding geocaching. Be sure to check with your local park authority before planning any geocaching activity.