Spring Mountain Ranch State Park is a wonderful place to visit. It's a place that has some nice hiking trails along the Red Rock Escarpment. From the parking lot, if you walk up the hill past the ranger station, you'll come to Lake Harriet, the reservoir that provides water for the ranch. There's a nice hike around the lake and you can continue on one of the overlook trails and visit the Wilson Family cemetery.
Make sure you take the time someday to visit the house and take the tour. There's a lot of history here and it's quite an interesting place. The place was owned by the Wilson Family and then later by a radio star, Vera Krupp (then owner of the Krupp Diamond), and by Howard Hughes.
The grounds are beautiful. There's a large field with many picnic tables and it's a relaxing place to stop for a picnic or just to enjoy the scenery.