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Opal Creek Wilderness
The Opal Creek Wilderness is a wilderness area located in the Willamette National Forest in the U.S. state of Oregon, on the border of the Mount Hood National Forest. It has the largest uncut watershed in Oregon.〔(【引用サイトリンク】 Opal Creek Wilderness )〕
Opal Creek and nearby Opal Lake were named for Opal Elliot, wife of early Forest Service ranger Roy Elliot.
== Geography and ecology ==
The Opal Creek Wilderness is adjacent to a designated "scenic recreation area" of , creating a nearly protected area.〔〔(【引用サイトリンク】title=Opal Creek Scenic Recreation Area )〕 In addition, the Bull of the Woods Wilderness in the Mount Hood National Forest shares its southern boundary with the Opal Creek Wilderness.〔(【引用サイトリンク】title=Bull of the Woods Wilderness )〕
The Opal Creek Valley contains 50 waterfalls and five lakes. Eight hiking trails, remnants of the early day prospecting and fire access routes, total .〔(【引用サイトリンク】title=Opal Creek Wilderness )〕 The valley forms the largest intact stand of old growth forest in the western Cascades, and 500- to 1000-year-old trees are common. The most abundant trees are Douglas-fir, Pacific silver fir, and western hemlock. Common hardwoods include bigleaf maple and red alder. Understory vegetation includes huckleberry, vine maple and rhododendron.〔(【引用サイトリンク】title=Opal Creek Wilderness: Overview/Background )〕
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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