Sitzmark Ski Area is a small ski area in north-central Washington near Havillah, about 20 miles northeast of Tonasket. Located on Knob Hill, it offers 10 named trails across 80 skiable acres. The mountain rises from a base elevation of 4,300 feet to a summit of 4,950 feet, creating a 650-foot vertical drop. Its slopes are served by a double chairlift and a rope tow, and Stump Run is its best-known trail.