Mount Fernow is a tall peak in the North Cascades in the U.S. state of Washington and within the Glacier Peak Wilderness of the Wenatchee National Forest. At in elevation it is the eighth-highest peak in Washington and the state's third-highest non-volcanic peak. It is also the highest peak of the Entiat Mountains, a sub-range of the Cascades. Mount Fernow's prominence is , making it the sixtieth-most-prominent peak in Washington. The closest peak to Fernow is Copper Peak, to the north, and the nearest higher peak is Bonanza Peak, to the north.