One of the things I like about traveling without a plan is the surprises I run into along the way. The Dewdney Trail was constructed in the mid-19th century and was a major trade rout across British Columbia.
This surviving segment of the trail was just next to the road at a campground I stayed at near Princeton, BC.
(Click the picture for a larger view)
It would have been a great place to camp right on the Similkamine River except for the major highway just on the other side... at least it was a free campground.