2,250 acre park. Dogs are allowed leashless in the undeveloped areas, North or Upper Park Road, only the lakes are off limits. In the developed areas West of Manzanita Ave., dogs can go leashless before sunrise to 8:30am. Highway 99, go East on Bruce Road, left on Chico Canyon Drive, left at Manzanita Avenue, and continue for about half a mile to Upper Park Road.