Complex sentence: U.S. Route 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.
Split into simpler sentences: U.S. Route 385 is a spur of U.S. Route 85. It currently runs for 1,206 miles (1,941 km) from Deadwood, South Dakota to Big Bend National Park in Texas.