Mont. Code Ann. § 77-3-123

In issuing mining leases, the board and the state have leased only such right, title, and interest as the state has in the lands, metalliferous minerals, or gems therein contained. Neither the state, the board, nor any representative, agent, or employee of the state or the board are under any liability for the failure of the title of the state, in whole or in part, to the lands, metalliferous minerals, or gems covered by the lease.