What Public Lands allow Geocaching activities ?
The National Park Service absolutely DOES NOT allow Geocaching on park lands. The Bureau of Land Management may allow it, you should check with the local office of the area you plan to visit. The Forest Service does allow geocaching activities on some of their lands; it is best to call ahead to the public lands you plan to visit to see what the local policy may be towards hiding caches. Many state parks and state public lands also have their own policies regarding geocaching. You should be sure to check with your local park authority before planning any geocaching activity.