The State of Wyoming formally accepted the lands granted by the act of Congress, 1897, ceding to the state one square mile to establish the Big Horn Hot Springs State Reserve, Febrary 24, 1897. Since this time, the name has been changed to Hot Springs State Park, and land has been added so that the park now contains 1,036.62 acres.

The Board of Charities and Reform (BCR) was tasked with administering the site starting in 1897. When the BCR was abolished popular vote on a constitutional amendment in 1990, the park was transferred to the newly created Department of Commerce. It was transferred to the Department of State Parks and Cultural Resources in 1999.

The services at the Hot Springs State Park include a state bath house, its use given free to people who are suffering from ailments for which bathing in the mineral water from the Big Horn Hot Springs will afford relief; maintenance of domestic water system, mineral water distribution system, sewage system, picnic grounds, campgrounds, roads, sidewalks, buffalo heard, the leasing of lands, the maintenance of buildings and fences, which provide protection for the gerneral public and the property of the state.