page_title: Reynolds Peak (Washington)
section_title: Geology
hierarchical_section_title: Reynolds Peak (Washington) / Geology
caption_attribution_description: English: Reynolds Peak seen from Courtney Peak
context_page_description: Reynolds Peak is an 8,517-foot mountain summit located in the Methow Mountains, a sub-range of the North Cascades in Washington state. It is protected by the Lake Chelan-Sawtooth Wilderness within the Okanogan National Forest. Reynolds Peak has a subsidiary peak, North Peak, which is .3 miles north of the summit. The nearest higher peak is Oval Peak, 8.55 miles to the southeast. Precipitation runoff on the east side of the mountain drains into the Twisp River via Reynolds Creek, whereas the west side of the mountain drains into the Stehekin River via Boulder Creek.
context_section_description: The North Cascades features some of the most rugged topography in the Cascade Range with craggy peaks, ridges, and deep glacial valleys. Geological events occurring many years ago created the diverse topography and drastic elevation changes over the Cascade Range leading to the various climate differences. These climate differences lead to vegetation variety defining the ecoregions in this area.
  The history of the formation of the Cascade Mountains dates back millions of years ago to the late Eocene Epoch. With the North American Plate overriding the Pacific Plate, episodes of volcanic igneous activity persisted.  In addition, small fragments of the oceanic and continental lithosphere called terranes created the North Cascades about 50 million years ago.
  During the Pleistocene period dating back over two million years ago, glaciation advancing and retreating repeatedly scoured the landscape leaving deposits of rock debris. The "U"-shaped cross section of the river valleys are a result of recent glaciation. Uplift and faulting in combination with glaciation have been the dominant processes which have created the tall peaks and deep valleys of the North Cascades area.
caption: Reynolds Peak seen from Courtney Peak
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