Elk are the park's most common ungulate. Tan-coloured animals with white rump patches, they can be seen throughout the park along the roadways. Elk are also the most dangerous animal in the park. In the spring, mother elk protect their newborn calves fiercely, warding off any and all creatures that come between them and their young by slashing with their hooves. Similarly, in the fall during the autumn rut, the bull elk become extremely aggressive towards people, using their large racks of antlers to display their dominance.
Distinctive features are the large ears and the black-tipped tail.
Although mule deer are frequently seen along roads and in the townsite during the winter, the population levels remain fairly low. Mule deer are most commonly found in small groups in drier open areas. Their summer diet includes shrubs and broad-leaved plants and the winter diet includes twigs of evergreens, saplings, and shrubs. Winter range on open slopes and aspen forest is often shared with elk. White-tails are smaller than mule deer.