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
Arra Mountains have waited out the flood here. Tountinna, the highest peak, does not qualify as a mountain using the usual convention whereby a mountain is defined (in Ireland and the UK) as any summit at least 2,000 feet (or 610 metres) high, whilst the official UK government's definition of a mountain is a summit of 600 metres or higher. In addition, some definitions also include a topographical prominence requirement, typically 100 feet (30 m) or 500 feet (152 m). In practice, mountains in Scotland are frequently referred to as "hills" no matter what their height, as reflected in names such as