In the driest corners of the park, along the northeast and northwest edges, rainfall averages 23 inches (58.4 cm) a year, while in the lowlands of the west side, about 30 inches (76.2 cm) of precipitation fall in the average year. As moist air is forced up to the elevations of the Divide, it loses its moisture and precipitation jumps to 100 inches (2.5 m) or more in isolated mountain cirques. Snowfall settles to around a 16-foot (4.9 m) average snowpack. Early summer snow removal on Going-to-the-Sun Road, which crosses the Continental Divide, is so spectacular it has become a spectator sport (via Road Crew photos in the park flickr album). Weather - Glacier National Park (U.S. National Park Service)