There are two main ways to get to this claim, one is significantly easier than the other.
The first way is the easier one, and is doable in a 2x4 vehicle assuming it is not wet. The soil here is mostly clay, so the roads get super slippery when they are wet, which will cause you problems in a 2x4 vehicle. Head out of Radersburg on Mill St, and you will climb a large dirt hill. At the top of the hill, I believe there is a sign that says entering BLM OHV area, and a road going to the left shortly after the top of the hill. You will turn onto that road going to the left. There are tons of trails that branch out from this road, but if you stay on what looks like the most driven road you will eventually get to the claim, where this road drops down into a gully.
The second way is much more difficult although maybe a little faster. It requires 4x4, especially if the ground is wet, and is suited for smaller vehicles rather than big trucks. You will head out of Radersburg on Mill St, and continue all the way until you hit the OHV staging area on your left, which is a big parking lot. There is a main road that continues from the southernmost part of the parking lot, and you will take that all the way into the claim