By Beth Sherard-Hutcheson times1@iw.net Land donated by Mary and Maud Adams, granddaughters of original homesteader Stephen Searls Adams, was turned into a state park 25 years ago. On Aug. 13, Adams Homestead and Nature Preserve celebrated its 25th year of being named a South Dakota State Park. The Adams donated the 1,500 acres, wishing the area to become a place where people, particularly…