Booming Ice Chasm is an ice cave in the Crowsnest Pass area of the Canadian Rockies. It is a cold-trap cave, where cold air enters the cave and is unable to leave, resulting in the entrance pitch and floor being covered in several metres of clear, smooth ice. The name derives from the acoustics of the cave. It was discovered, explored and mapped in 2008 by the Alberta Speleological Society.An expedition led by Nicholaus Vieira was filmed by François-Xavier de Ruydts and became a 19-minute documentary, which takes the viewer inside the cave. The coordinates provided here and on other websites are incorrect. We had two GPS units and search the area within a 100 to 300m radius of the coordinates, but did not find the entrance.