Dogs are technically allowed in the park, however, it can be a hassle to bring them. Dogs are NOT allowed on ANY hiking trails or anywhere off gravel roads. If you choose to go hiking, you must leave your dog in your vehicle. Dogs are allowed at the campsites but must be kept on a leash. The rule is in place to protect the wildlife that calls Joshua Tree their home, and to protect your dogs from getting injured or going missing in the vast desert.