Assiniboine (11,870') is one of Canada’s most striking mountains.
The SW Face route is described here: https://www.mountainproject.com/route/107303835/southwest-face 22 km with 2450m of elevation gain.
The North Ridge of Mount Assiniboine is one of the classic routes of the Canadian Rockies. The first ascent of the route was in 1903 by W Douglas and guides C Hasler and C Kaufmann. Today it is the most popular route on the mountain and attracts climbers from around the world. To go fast on the route, dry conditions are required. When dry, the route is mostly a scramble with one 5.5 pitch through the Grey Band and then a few more short, exposed fifth-class steps near the summit.
The Assiniboine Creek approach is the quickest way to access the mountain (without helicopter assistance). The FKT starts at the trail register at the trailhead. Follow the trail through thick forest for 7km to the beautiful Assiniboine Lake. Bears are frequently encountered along this trail. From the lake the trail climbs up a large scree slope, follows a moraine up to a glacier and eventually reaches the Strom-Assiniboine Col. From there, a short descent takes you to the base of the ridge. The route starts at the same TH as the SW Face route, but circles around to the N side to gain the N Ridge. It is about 28 km round trip, with 2450m of elevation gain.
For more beta, check out the excellent trip report here: https://stevensong.com/canadian-rockies/bc-rockies/mount-assiniboine/
Or info on Mountain Project: https://www.mountainproject.com/route/106995815/north-ridge