Mount Thor

Mount Thor is a granite peak on Baffin Island in Nunavut, within Auyuittuq National Park, famous for having the greatest vertical drop on Earth. Its west face overhangs dramatically, falling roughly 1,250 metres in a sweep of sheer and beetling stone.

The rock is granite, forming an immense, overhanging big wall that is among the most extreme rock features on the planet. The climbing is expedition big-wall, combining aid and free techniques on multi-day ascents up the towering face, with difficulty at the far end of the scale and routes demanding portaledges, hauling, and cold-weather endurance. Only a handful of parties attempt the wall each year, and success requires elite skill, heavy logistics, and patient weather-watching in the high Arctic.

Practical detail: access is a full Arctic expedition. Climbers fly to the community of Pangnirtung or Qikiqtarjuaq, travel by boat or snowmobile, then hike many kilometres up the Weasel River valley through Auyuittuq National Park to the base of the wall. Everything is carried in, and Parks Canada requires registration and orientation. There are no facilities, and polar bears and river crossings add hazards to the approach.

Season and character: the brief climbing season falls in the Arctic summer, roughly late June to August, when the midnight sun provides continuous daylight and temperatures are least severe, though snow and cold persist. Mount Thor stands as a symbol of extreme big-wall climbing, a colossal overhanging cliff in a remote tundra wilderness where the scale of the wall is matched only by the scale of the commitment needed to reach and climb it.