East Bay Regional Park District has many wonderful hiking areas. Huckleberry Preserve in the Oakland hills offers self guided nature trails (maps available in parking lot) where you'll see a variety of California native flowers and trees such as bay laurel, oaks and manzanita. Huckleberry Botanic Preserve is an ecological jewel. You can take the 1.7 mile loop or take the longer hike where you end up at the Sibley Volcanic Preserve, another great hiking spot. Because of the fragile nature of Huckleberry Preserve, dogs, bicycles, and horses are prohibited, except dogs and horses are allowed on the Skyline National Trail section. Jogging is discouraged due to uneven trails & underbrush.