Deer Creek Hills is a Sacramento Valley Conservancy property that, in conjunction with FATRAC, is open June-October every Monday night for mountain biking. Guided rides are also available on the last Saturday of each month in the summer.
The area is comprised of a maze of social/cow trails that are combined into "courses" using cones. The course changes every week. This is a unique place to ride and a great example of a collaboration between an IMBA chapter and a land conservancy group.