★★★ Cardiac Arete 5.10d

Quartzite spire with amazing exposed climbing.

2024 update: you can no longer park at Moraine Lake or Paradise Valley. You have to book a shuttle at the park-and ride. Regular shuttles start at 630am and leave every 30 minutes, but there are also limited alpine start shuttles at 4am and 5am https://parks.canada.ca/pn-np/ab/banff/visit/parkbus/louise#alpinestart

Old approach: park at Moraine Lake (or Paradise valley if Moraine parking is full) and hike up to the col, head down the valley and the traverse the scree towards the left of the Grand Sentinel via a notch to get to the climb (there's a cairn at the notch). Watch out for rockfall when the sun hits the snow crossing the scree field. May be safer to traverse lower down to avoid the projectiles. There's less rockfall coming from below from Paradise Valley.