He also loved the views of the Palouse just across the border in Idaho from the ridgetops along a winding dirt road called Skyline Drive. He began buying up property there so that he could present Idaho with a state park.
When Virgil McCroskey approached the Idaho Legislature in 1951 about accepting his gift of land, legislators worried about upkeep and about taking 2,000 acres off the property tax rolls. McCroskey purchased more property to add to the gift. By 1954, he had 4,400 acres to offer and a new governor, Robert E. Smylie, as a supporter. Still the legislators were concerned about maintenance, so McCroskey, 79 years old, agreed to maintain it himself for the next 15 years. The lawmakers finally relented, accepting the gift. McCroskey kept his word, taking care of the site until just before his death at age 94 in 1970.
In a sense, he still cares for the park today. McCroskey left $45,000 in trust to the state to be used for maintenance of Mary Minerva McCroskey State Park, which is named for his mother in honor of the pioneer women of the West.