Begin from Lewis and Clark Park in Troutdale. Ride the historic highway to the Stark St. bridge. Turn right onto Stark St. and climb to Kerslake Rd. Go left for more climbing on Kerslake. Turn left on Division, which becomes Oxbow Drive after 1/2 mile. Endure a gradual climb to Altman Rd then a short, steep climb on Altman Rd followed by a 2/3 mile flat stretch to Lusted Rd. Go left on Lusted Rd and continue to Dodge Park, then up the other side to the junction of Thomas Rd and Ten Eyck Rd. Stay straight onto Thomas Rd, riding to Ten Eyck Rd. Go right onto Ten Eyck and continue 1/2 mile to Shipley Rd. Turn left onto Shipley Rd for 1.5 miles of steady 5-6% grade, coming out at Marmot Rd. Turn right on Marmot for some downhill to Ten Eyck again. Go straight onto Ten Eyck for two killer climbs, both of which have grades up to 14%. Ten Eyck comes out at highway 26 in Sandy. Turn right and go downhill to Bluff Rd. Turn right on Bluff Rd and continue to 347th Ave. Turn right onto 347th, which becomes Cottrell Rd at the county line and ride to the Dodge Park Blvd. intersection. Go left onto Dodge Park Blvd and ride to Altman Rd. Go right onto Altman and finish via Oxbow Drive, Kerslake, Stark St and finally the historic highway.