NC-078 is in the middle of the Tillamook State Forest, far enough away from Portland to be a hassle, but close enough to the city of Tillamook that it's a pretty easy activate if you are already out on the coast. It's in the same neighborhood of the Kilchis River as NC-103 or Stanley Peak.
Drive on hwy from Portland: approx 50 miles, 1 hour
Drive on forest roads: 8 miles
Hike: 1/2 mile, 250 ft gain