South Sister (10358 ft) is the third highest peak in Oregon. It is the highest of the Three Sisters, near Bend, Oregon. The route to the summit is mildly technical (class 3) and ascends 5600 feet in about 6.25 miles.

https://www.outdoorproject.com/adventures/washington/climbing/mount-thompson-west-ridge

Bernadette Benson posted this (9/16/2016):

This one could go in Canada, as well, because the trail is a 1,000 mile winter route that goes between Whitehorse, Yukon Territory, Canada and Fairbanks, Alaska, USA. It is used every February in the Yukon Quest sled dog race and the eastern/Canadian side is used every February in the Yukon Arctic Ultra foot (and ski or bike) race. It is a winter trail put in each year, with occasional sectional reroutes/diversions due to safety, dependent on weather conditions that year (e.g., jumble ice, open water on rivers).

summitpost.org:

Mount Washington is the central plug (volcanic neck) of an extinct shield volcano. Details of the mountains origin, eruptive history, geology, and geomorphology can be found at this USGS Mount Washington page