Activities with pets are very limited at Mesa Verde National Park. Pets are not allowed on trails, in archeological sites, or in buildings (service animals, excepted). Pets may be walked along paved roads, in parking lots, and at the campground. However, pets must be leashed at all times when outside a vehicle. Leaving pets unattended or tied to any object within the park is prohibited, including the exterior of motor vehicles parked within park boundaries.