National Park Service offers a guide as how to make your dog’s trip to the great outdoors a fun and safe experience for everyone.
Per their website, dogs require to be on 6 ft leash and are required to stay on trails, roads and developed areas (campgrounds and parking lots). Dogs are not allowed in buildings (except aid dogs) and where posted.”
Parks your dog can be off leash:
- Conejo Creek Dog Park
- Oak Canyon Dog Park
- LA Mountains Off-Leash Dog Parks
- City of Los Angeles Off-Leash Dog Park Facilities
Parks and trails your dog must be on leash is listed here.