The Hidden Lake Peak Lookout was added to the National Register of Historic Places on July 14, 1987, and is also on the National Historic Lookout Register. The lookout is generally accessible from July until October, as determined by snow conditions. A volunteer group now maintains the lookout, which is open to the public on a first-come-first-serve basis for overnight use. Fred Darvill and the Skagit Alpine Club obtained a special use permit to restore and maintain the structure. Forest Service in 1931 and was staffed until 1958, when many fire lookouts in the North Cascades were closed. The gable roof single-room 14' by 14' lookout was built by the U.S. 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. The “U”-shaped cross section of the river valleys are a result of recent glaciation. ĭuring the Pleistocene period dating back over two million years ago, glaciation advancing and retreating repeatedly scoured the landscape leaving deposits of rock debris. In addition, small fragments of the oceanic and continental lithosphere called terranes created the North Cascades about 50 million years ago. With the North American Plate overriding the Pacific Plate, episodes of volcanic igneous activity persisted. The history of the formation of the Cascade Mountains dates back millions of years ago to the late Eocene Epoch. Geological events occurring many years ago created the diverse topography and drastic elevation changes over the Cascade Range leading to various climate differences. The North Cascades features some of the most rugged topography in the Cascade Range with craggy peaks and ridges, deep glacial valleys, and granite spires. Because of maritime influence, snow tends to be wet and heavy, resulting in high avalanche danger, particularly on the steep western meadow-covered slopes that are above treeline. During winter months, weather is usually cloudy, but, due to high pressure systems over the Pacific Ocean that intensify during summer months, there is often little or no cloud cover during the summer. As a result, the west side of the North Cascades experiences high precipitation, especially during the winter months in the form of snowfall. As fronts approach the North Cascades, they are forced upward by the peaks of the Cascade Range ( Orographic lift), causing them to drop their moisture in the form of rain or snowfall onto the Cascades. Most weather fronts originate in the Pacific Ocean, and travel northeast toward the Cascade Mountains. Hidden Lake Peaks are located in the marine west coast climate zone of western North America. Precipitation runoff from Hidden Lake Peaks drains into Cascade River which is a tributary of the Skagit River. The mountain's name is taken from its proximity to Hidden Lake which lies in a cirque below the east aspect of these two main peaks. The popular subsidiary peak, Hidden Lake Lookout (6890 ft), lies a half mile to the southwest of the highest summit. Situated on the western boundary of North Cascades National Park, Hidden Lake Peaks are positioned west of the crest of the Cascade Range, approximately ten miles east of the town of Marblemount. The peaks extend three miles southwest from the nearest higher peak called The Triad. Hidden Lake Peaks is series of peaks with a maximum elevation of 7,088 feet (2,160 meters) that are located in the North Cascades, in Skagit County of Washington state. Location in the United States Show map of the United States
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