Location: US-64 and SH-136, Texas Cty Reassurance shield as 136 joins the concurrency. Location: US-64 and 24th St, Guymon Less than a mile later, we’ll enter Guymon, the Oklahoma Panhandle’s largest city. Location: Main St and 12th St, Guymon On the north edge of Guymon, turn left to follow 64/412/3/136 truck, which is actually just … Continue reading Oklahoma State Highway 136, US-64/US-412/OK-3 to US-64