Sulphide Glacier is in North Cascades National Park in the U.S. state of Washington, on the south slopes of Mount Shuksan.

[2] Descending 1.85 mi (2.98 km) from the summit tower of Mount Shuksan, it is connected to Crystal Glacier to the east.

[2] Sulphide Glacier is along the route taken when Mount Shuksan was first climbed in 1906.

[3] Both Sulphide and Crystal Glaciers have a series of 300-to-1,000-foot-high (91 to 305 m) cascades which are collectively referred to as Sulphide Basin Falls.

[4] Below these cascades lies Sulphide Lake, which empties over Sulphide Creek Falls, one of the highest waterfalls in North America with a nearly 2,200 ft (670 m) drop.