McCroskey State Park occupies the rocky slopes of Skyline Ridge on Mineral Mountain, in a transitional zone between the Palouse prairie to the west (and south) and the Rocky Mountains to the east. The park's chief attraction is a narrow unimproved road called Skyline Drive, which winds for along a steep ridge, climbing through dense cedar forest that gives way to stands of ponderosa pine and, eventually, to prairie. The road also links a scattering of interpretive signs and vista points.