The Dewdney Historic Trail is a 720-kilometre route stretching across southern British Columbia from Hope on the Fraser River to Wild Horse Creek near Fort Steele in the East Kootenays.

Built in two stages — Hope to Rock Creek in 1861 and onward to the East Kootenays by 1865 — it was constructed to give the British colony a direct Canadian supply corridor to gold rush camps that were otherwise more easily reached from Washington Territory to the south.

Named after lead engineer Edgar Dewdney, the trail crosses the Cascade, Monashee, Selkirk, and Purcell mountain ranges, connecting coastal valleys with a series of interior river valleys within the Columbia watershed.

Though much of the original trail has been lost, its influence persists: the Crowsnest Highway 3 follows nearly the same alignment Dewdney surveyed in the 1860s.

Surviving sections remain hikeable today, with one documented segment between Christina Lake and Santa Rosa spanning roughly 14. 5 kilometres and offering multiple road-crossing access points along the way.