Sulphide Creek Falls is a tall, moderately large volume waterfall within North Cascades National Park in Washington state. The falls drop from Sulphide Lake (elevation ) on the southeast side of Mount Shuksan down a narrow flume-like canyon to a broad basin below. Because of the narrow, twisting shape of the canyon the waterfall is exceptionally difficult to see from ground-level perspectives. The total vertical drop of the waterfall is in the range of to feet, but it has not yet been accurately measured. Foot access to the bottom of the waterfall involves of off-trail travel in extremely brushy terrain and several potentially dangerous fords of a large stream.