Yes, dogs are allowed in the backcountry of Hawaii Volcanoes National Park. All pets must be leashed at all times and may not be left unattended. Pets are also prohibited from entering any public buildings, some trails, and on public shuttles within the park. Visitors should also note that there is a high concentration of native Hawaiian wildlife in the park, including wild pigs and nene geese. For safety reasons, it is best to keep pets away from these animals while exploring the backcountry.