If it is within a National Park boundary, you're out of luck.
If outside of the boundary, then dig out who owns the ground (federal or private), then who hold mineral rights. Then see if withdrawn from mineral entry, and if any claims filed on it.
If outside the park, your state BLM office can tell you who owns the mineral rights if you provide them with township, range and section. They can also break down any claims by 1/4 section in LR2000, any further breakdown can be done by the office. Ground ownership can be found at the county recorders office.