Which former U.S. national park was the second national park established after Yellowstone?

Mackinac National Park was the second U.S. national park established after Yellowstone.

Congress created Mackinac National Park in Michigan in 1875, three years after Yellowstone. It covered much of Mackinac Island, while Fort Mackinac remained under Army control. The island’s dramatic scenery and growing popularity as a summer destination helped inspire its national designation.

The park was unusual because the federal government provided little operating money. The fort’s commander served as park superintendent, and soldiers acted as caretakers. The park included natural features such as Arch Rock and Sugar Loaf, as well as historic military surroundings.

Mackinac National Park lasted only until 1895. When the fort was decommissioned, the federal government transferred the park to Michigan, creating Mackinac Island State Park, which still exists today.