Centennial Mountains Rock Lakes National Wildlife Refuge, state and private land, and part of a USDA Agricultural Research Station for sheep. Around 326 vascular plant species have been identified in the Centennials, an unusual plant diversity for the Yellowstone region. Grizzly bears inhabit the area, as nearly all species indigenous to the Greater Yellowstone Ecosystem are present. The north slope of the Centennials rises abruptly 3,000 feet above the Centennial Valley. Centennial Mountains The Centennial Mountains are the southernmost sub-range of the Bitterroot Range in the United States states of Idaho and Montana. The Centennial Mountains include the Western and Eastern Centennial
Tortolita Mountains include the Santa Catalina Mountains (the area's most prominent), the Rincon Mountains, the Santa Rita Mountains, and the Tucson Mountains. Tortolita Mountains The Tortolita Mountains are a modest mountain range northwest of Tucson, Arizona, USA, at the northern boundaries of Oro Valley and Marana, two suburbs of Tucson. Peak elevation is 4,696 feet (1,431 m). Much of the mountain range is protected within the Tortolita Mountain Park, established in 1986 by Pima County and slated for further expansion. Public access to the Park, especially from Marana, has become contentious. The Tortolita Mountains include extensive cultural resources. Native American peoples known