Article · Wikipedia archive · Last revised Jul 30, 2026

Absaroka–Beartooth Wilderness

Absaroka–Beartooth Wilderness is a 937,102 acres (3,792.32 km2) protected wilderness area on the border of Montana and Wyoming, United States. It was designated by Congress in 1978 and originally comprised 904,500 acres (3,660 km2) in the Custer National Forest and Gallatin National Forest National Forests of Montana. The wilderness area was modified in 1983 through the Lee Metcaff Wilderness and Management Act and in 1984 through the Wyoming Wilderness Act, which added area from the Shoshone National Forest and brought it to its present total.

Last revised
Jul 30, 2026
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Source
Absaroka–Beartooth Wilderness
Location within the United States
LocationMontana / Wyoming, USA
Nearest cityRed Lodge, MT
Coordinates45°6′N 109°56′W / 45.100°N 109.933°W / 45.100; -109.933
Area937,102 acres (3,792.32 km2)
Established1978
Governing bodyU.S. Forest Service

Absaroka–Beartooth Wilderness is a 937,102 acres (3,792.32 km2)1 protected wilderness area on the border of Montana and Wyoming, United States. It was designated by Congress in 19782 and originally comprised 904,500 acres (3,660 km2) in the Custer National Forest and Gallatin National Forest National Forests of Montana.2 The wilderness area was modified in 1983 through the Lee Metcaff Wilderness and Management Act3 and in 1984 through the Wyoming Wilderness Act, which added area from the Shoshone National Forest and brought it to its present total.45

Geology

The namesake mountains have geologically distinct origins. The Beartooth Mountains are composed of granite, while the Absaroka Range is primarily extrusive volcanic and metamorphic rock.6 The Absaroka are noted for their dark and craggy appearance, lush and heavily forested valleys, and abundant wildlife. The highest peak in the Absaroka range within the wilderness area is Tumble Mountain at 11,319 feet (3,450 m). The Beartooth Mountains are more alpine, with huge treeless plateaus and home to Montana's high point: Granite Peak (12,807 feet (3,904 m)). They also have the largest unbroken area of land over 10,000 feet (3,000 m) high in the U.S. outside of Alaska. The wilderness has more than 120 peaks over 10,000 feet (3,000 m) and 28 peaks over 12,000 feet (3,700 m).7

Ecosystem

Threats

The widespread detection of total coliforms, Bacteroides, and E. coli in the water sources of the wilderness area is leading to the question of whether it's because of the increasing human visitation. Visitors to the wilderness are encouraged to purify the water carefully before consumption.8 The wilderness has imposed some regulations to protect the water source, such as camping and burying human waste within 200 feet (61 m) of lake or stream is prohibited, and waste has to be buried 6 inches (15 cm)-8 inches (20 cm) deep.9

See also

See also

References

References

  1. "Absaroka-Beartooth Wilderness". Wilderness.net. University of Montana. Retrieved July 11, 2026.
  2. "Public Law 95-249" (PDF). U.S. Congress. March 27, 1978. Retrieved July 11, 2026. An Act to designate the Absaroka-Beartooth Wilderness, Custer and Gallatin National Forests, in the State of Montana.
  3. "Public Law 98-140" (PDF). October 31, 1983. Retrieved July 11, 2026.
  4. "Public Law 98-550" (PDF). October 30, 1984. Retrieved July 11, 2026.
  5. Aarstad, Rich, et al. "Montana Place Names from Alzada to Zortman: A Montana Historical Society Guide". Montana Historical Society Press. Helena, Montana, 2009, p. 2
  6. "Shoshone National Forest - Absaroka-Beartooth Wilderness". FS.USDA.gov. Retrieved July 11, 2026.
  7. Graetz, Rick; Graetz, Susie. "Absaroka-Beartooth Mountains Represent The Roof Of Montana (Part 1 Of 2)".
  8. Pendergraph, Daniel; Ranieri, John; Ermatinger, Lochlin; Baumann, Adam; Metcalf, Alexander; DeLuca, Thomas; Church, Matthew (2021). "Differentiating Sources of Fecal Contamination to Wilderness Waters Using Droplet Digital PCR and Fecal Indicator Bacteria Methods". Wilderness & Environmental Medicine. 32 (3): 332–339. doi:10.1016/j.wem.2021.04.007. PMID 34172374.
  9. United States. Forest Service. (2001). Absaroka-Beartooth Wilderness: Custer, Gallatin and Shoshone National Forest: keep wilderness wild, national wilderness preservation system. [Washington, D.C.? : U.S. Dept. of Agriculture, Forest Service 2001].
Further reading

Further reading

External links