For those looking to ski the “keyhole” couloir (Cathedral Mountain North Couloir) please check out this closure.

https://www.pc.gc.ca/en/pn-np/bc/yoho/bulletins/A61949C5-F9D0-4F8A-85C4-DAAA878754EC

This includes all north facing terrain in the main north bowl of Cathedral plus sections of the valley to the west of it.

Remember it is against the law to cross the railway tracks in unofficial crossing areas. This includes the Wapta Lake shortcut to the Cathedral Glades zone for example, (which is easily accessed by going west at the 2km marker from Lake O’Hara Road).