Bessemer Mountain is a 5,166-foot summit in Washington on the western edge of the Cascade Range within Mount Baker-Snoqualmie National Forest. It is notable less for its absolute elevation than for its dramatic rise above the surrounding terrain, especially where its south side climbs more than 4,200 feet above the Middle Fork Snoqualmie River in just two miles. Water from the mountain drains into tributaries of the Snoqualmie River. Its setting reflects the western Cascades' marine west coast climate, with heavy winter precipitation and avalanche-prone wet snow, while the broader landscape was shaped by uplift, faulting, and repeated glaciation, including a major retreat beginning about 14,000 years ago.