Location: Walnut St and 10th St, Tarkio Reassurance shield as US-136 splits. Location: US-136 and Route O, Atchison Cty As we head out of Tarkio, we’ll approach Route O. Location: US-136 and Route O, Atchison Cty Turn left for O north. Stay straight for 136 east. Location: US-136 and Route O, Atchison Cty Reassurance shield after … Continue reading U.S. Route 136, US-59 to MO-113