State Parks are not created for dogs. State Parks are created to protect the native plants and animals. For example, when dogs urinate, their scent can disrupt the normal foraging of mule deer whose nourishment needs are highly specific. You may see your dog as a pet, but a deer smells a canine predator. Chino Hills State Park also offers an array of dangers to your pet: ticks, inhaled foxtails, and rattlesnake bites are just a few. It is certainly no place for a small pet. Dogs are only allowed on the paved Bane Canyon entrance road, in the Rolling M Ranch area, and at the campground supervised. They must be leashed at all times.