Trails: Trails accommodate hikers, mountain bikers and equestrians. Dogs on a leash are welcome on all trails. Drinking fountains, restrooms and self-guiding brochures of the historical features of the many trails are available at the Visitor's Center. Trail volunteers are also available to lead hikes upon request. Horses and bikes allowed on the 787 acres of back-country trails, but not inside the park's developed thirteen acres. So leave your cares and pagers and cell phones behind and take a drive up Highway 49.Mountain Biking: Beginner to intermediate, year round, 1.5 to 10 miles, trail maps at Visitor's Center. Hiking: Wear …