Diamond Peak Wilderness
| Diamond Peak Wilderness | |
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IUCN category Ib (wilderness area)
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Diamond Peak from the Pacific Crest Trail
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| Location | Klamath / Lane counties, Oregon, United States |
| Nearest city | Oakridge, Oregon |
| Coordinates | 43°31′0″N 122°9′0″W / 43.51667°N 122.15000°WCoordinates: 43°31′0″N 122°9′0″W / 43.51667°N 122.15000°W |
| Area | 52,337 acres (21,180 ha) |
| Established | 1964 |
| Governing body | U.S. Forest Service |
The Diamond Peak Wilderness is a wilderness area straddling the Cascade crest and includes the Diamond Peak volcano. It is located within two National Forests - the Willamette National Forest on the west and the Deschutes National Forest on the east.
On February 5, 1957, the Forest Service established the 36,637-acre (14,826 ha) Diamond Peak Wild Area. Upon passage of the federal Wilderness Act in 1964 it was reclassified as wilderness. With the passage of the Oregon Wilderness Act of 1984, Diamond Peak Wilderness increased in size to its present 52,337 acres (21,180 ha).
At 8,744 feet (2,665 m), Diamond Peak is the most prominent peak in the wilderness, followed by Mount Yoran at 7,138 feet (2,176 m) and Lakeview Mountain at 7,057 feet (2,151 m). Diamond Peak is a shield volcano formed as the entire Cascade Range was undergoing volcanic activity and uplift. Glaciers carved the large volcanic peak, and when they receded, the bulk of the mountain remained, with snowfields near the summit and dozens of small lakes surrounding the peak. These lakes range from one to 28 acres (11 ha) in size. Approximately 14 miles (23 km) of the Pacific Crest National Scenic Trail pass through this wilderness. Another 38 miles (61 km) of trail, including the 10-mile (16 km) Diamond Peak Trail, stretches the length of the west side of the peak.
Nearly the entire Diamond Peak Wilderness is covered with mixed stands of mountain hemlock, lodgepole and western white pine, and silver, noble and other true firs. Alpine flowers, including varieties of mimulus, trillium, lupine, penstemon, heather, and Indian paintbrush, are common along trails, lake shores, streams and in the meadows. Huckleberry and dwarf manzanita are common in the dense underbrush.
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