I'm semi-retired from the law-talking business these days and one thing I've started doing in my spare time is prospecting for gold or silver in Nevada and California.
It's a great way to spend a two-week 'vacation' - lovely country (especially if you like deserts, and I do) - there are lots of places to look, it is decent exercise and bonus there actually is gold and silver still to be found on public lands in those two states.
The best beginning book I've found is 'Stake your Claim' by Mark Silva it's not great but it is one of the few books that properly explains the 'township system'. The most difficult part of prospecting isn't going out and digging for ore with a pick and shovel, it's figuring out your location so you can stake a legal claim. There is an entirely separate system for locating position (the township system) that is used for mining claims, and if you don't use that system in your claim notice then your claim notice is void.
If for some reason you are ignorant of US Mining Law, under a still valid 1872 statute, any US Citizen has the right to prospect for valuable minerals (gold, silver, copper, etc - but not oil or gas or sand) on government land as long as that land is not being used (so military bases and GSA property is out), and if you find a valuable mineral you can stake a claim to that mineral lode, though your claim is limited to about 20 acres However, you can link up with other people to get control of up to 160 acres.(there are variations and nuances to all this but this is a good thumbnail).
Here's an example of a BLM township map for an area in Nevada:
Nevada Bureau of Land Management
All that area with nothing on it is open to prospecting for this particular quad.
As Mark Twain says: every man should prospect once in life. On the chance that one of you yokels has prospected more than I have, I'd be interested in an pointers.