9.3 miles, Half day
This is a stellar 9.3 mile loop that will burn your legs with 1,900 feet of elevation gain on mostly gravel forest service roads but with a couple single track descents and descents along the way. Feel free to hike this if you'd like also.
Follow Harrison out of North Corvallis and turn right onto Oak Creek Road as you enter the hills. Drive to the end of the road to the parking area.