Glen Canyon, Utah. Hiking along West Canyon at a location 100 feet below the high-water mark of Lake Powell. Due to a prolonged drought in the West, the upper reaches of many spectacular side canyons of Glen Canyon have recently emerged from beneath the waters of Lake Powell. Before being inundated by the waters of the reservoir, West Canyon was one of the longest and most spectacular side canyons within all of Glen Canyon. By April of 2005, the reservoir had dropped to a level 145 feet below its full-pool elevation with only 32% of its water volume remaining. With increasing demands on the Colorado River, it will take many, many years of above-average snowfall to fill Lake Powell to its normal elevation of 3700 feet above sea level.