Mount Si rises above North Bend on the western edge of the Cascade Range east of Seattle and is among western Washington’s most recognizable mountains. Named with nearby Little Si for homesteader Josiah “Uncle Si” Merritt, it is both a familiar popular-culture landmark and one of the region’s busiest hiking destinations, drawing roughly 80,000 to 100,000 hikers each year. Protected as a Washington Natural Resources Conservation Area, it combines demanding but accessible trails with notable geological significance as a remnant of an oceanic plate volcano. In Snoqualmie tradition, it is the fallen body of Moon, a paramount deity whose face is visible near the summit.