AMP: 208 Location: US-14 and US-310, Big Horn Cty Reassurance shield after the junction, the routes will pick up Wyoming 789. AMP: 205 Location: N 6th St and 15th Ave N, Greybull Welcome to Greybull! AMP: 205 Location: N 6th Ave and 15th Ave N, Greybull To follow the Big Horn scenic byway, use US-14 … Continue reading U.S. Route 20, US-310/WYO 789 to US-14