My children grew up hiking the trails of Annadel, a 5,000-acre paradise of streams, meadows, rolling foothills and canyons, and woodlands thick with oak, fir, and redwoods. Biologists say this is the best example of northern oak woodland in existence.You can hike, horseback ride, bike; fish for bass and bluegill in Lake Ilsanjo—a 2.5-mile hike from the parking lot—and eat at picnic tables at the lake. Wildflowers explode from March through early summer; it can be hot and dry in late summer and early fall. Bring your own water.