U.S. Route 385 (US 385) is a spur of U.S. Route 85 that runs for 1,206 miles (1,941 km) from Deadwood, South Dakota to Big Bend National Park in Texas. Route description |- |TX |545 |877 |- |OK |36 |58 |- |CO |317 |510 |- |NE |181 |290 |- |SD |122 |196 |- |Total |1206 |1941 |} Texas US 385 is designated as a part of the La Entrada al Pacifico trade corridor from Interstate 10 in Fort Stockton to Interstate 20 in Odessa. The section from Fort Stockton to McCamey runs concurrently with US 67. From McCamey, the route proceeds to Crane in Crane County. From Crane to Odessa, US 385 intersects with U.S. Highway 62 in Seminole and continues northward to Brownfield, where US 385 continues northward towards Levelland and crosses by Texas State Highway 86 in Dimmitt, as well as U.S. Highway 84 in Littlefield. From Littlefield, US 385 continues northward until it crosses Interstate 40 and then goes in a half circle to Hartley, where US 385 joins U.S. Highway 87. US 385 and US 87 follow a northwest track until the two meet U.S. Highway 54 then split, with US 385 continuing northward until it exits Texas at the Oklahoma border. On rural US 385, the speed limit is 75 mph in all counties going south of Gaines County starting between Seminole and Andrews down to US 90 in Marathon. Oklahoma In Oklahoma, US-385 runs through Cimarron County at the end of the Oklahoma panhandle. Fourteen miles north of the border, it joins with US-56, US-64, and US-412. The three highways run northeast into the county seat, Boise City. In the middle of town, the highways come to a traffic circle surrounding the Cimarron County Courthouse. The traffic circle serves six highways (with most passing through): U.S. Routes 56, 64, 385 and 412, and State Highways 3 and 325. After leaving the circle, US-385 heads northward, overlapping US-287 and SH-3, the state's longest state highway. SH-3 ends at the state line while US-287/385 continue north into Colorado. The section of US-385 that overlaps SH-3 is also signed as Governor George Nigh's Northwest Passage, after the governor of Oklahoma responsible for improvements to the corridor. Colorado U.S. 385 passes north–south through the easternmost counties of Colorado. It enters the state south of Campo on an overlap with U.S. Route 287. The overlap continues north until Lamar.