Originally opened in 1929 as the Grayling Winter Sports Park on land willed to the state for recreational or military use, Hanson Hills is now run by the Grayling Recreation Authority, a consortium of the city of Grayling, Crawford County, the Crawford Au Sable Schools.
Hanson Hills is the successor area to Bear Mountain, which was the name of the area from around 1970 until 1973, when the area was padlocked due to a legal dispute about the use of the land. The History of Hanson Hills is recounted on their home page (near the bottom).
Hanson Hills has downhill skiing with a ski school (free to 3rd and 4th graders) and snowboard school, nordic skiing, a terrain park, and tubing. They boast 11 slopes, a T-bar and 2 rope tows. In summer, they have disc golf, mountain biking and archery. In the fall, they offer flag football and cheering lessons for elementary school youngsters. The recreation authority also operates the former state fish hatchery on the north side of town on the East Branch of the Au Sable River.
The picture below is from http://www.waterwinterwonderland.com/skiresorts.aspx.