MP: 42.25 Location: Diagonal St and 6th St, Clarkston SR 129 begins, heads a couple blocks down Diagonal St, and then turns left onto 6th St MP: 42.11 Location: 6th St and Diagonal St, Clarkston Reassurance shield as we enter downtown Clarkston MP: 41.42 Location: 6th St and Terrace Dr, Clarkston As we exit downtown … Continue reading State Route 129, US-12 to OR-3/OR State Line