Absaroka-Beartooth Wilderness was created from existing National Forest lands in 1975 and is located in Montana and Wyoming, United States. The wilderness is partly in Gallatin, Custer and Shoshone National Forests and is composed of 944,000 acres (3,800 km²). The wilderness encompasses two distinct mountain ranges, namely the Beartooth and Absaroka ranges. These ranges are completely distinct geologically speaking with the Absarokas composed primarily of volcanic and metamorphic rock, while the Beartooths are made up almost entirely of granitic rocks. The Absarokas are noted for their dark and craggy appearance, lush and heavily forested valleys and abundant wildlife. The highest peak in the range is Francs Peak at 13,153 ft (4,009 m). The Beartooths are more alpine with huge treeless plateaus and the highest peak in the state of Montana (Granite Peak 12,799 ft/3,900 m). The wilderness contains 30 peaks over 12,000 ft (3,658 m). The wilderness is an integral part of the 20 million acre (81,000 km²) Greater Yellowstone Ecosystem and borders Yellowstone National Park.