Quieter than the Dakotas, but still meaningful.
Montana's oil and gas activity is concentrated in the eastern third of the state, where the Williston Basin (and its famous Bakken play) extends westward from North Dakota. Richland, Roosevelt, and Sheridan counties have seen meaningful Bakken development, though never at the intensity of the play's North Dakota core.
South of the Bakken, the Cedar Creek Anticline runs through Fallon and Wibaux counties, producing from shallower conventional reservoirs at a steady, long-standing pace. Further west, smaller plays exist in the Powder River Basin of southeastern Montana and the Big Horn Basin, but activity in both is limited.
For Montana mineral owners, inherited rights often trace back several generations to ranching and homesteading families. Ownership records can be complex, especially for split estates where the surface has been sold away but the minerals remain in the family.