The Greensboro Urban Loop is a partially completed 43.1-mile (69.4 km) beltway around Greensboro, North Carolina, United States. The loop carries Interstate 73 (I-73), I-85, I-785, I-840, and U.S. Route 421 (US 421). It is primarily located within Greensboro city limits, though it crisscrosses the city line many times. The right-of-way of the Urban Loop and its interchanges between Elm-Eugene Street and Huffine Mill Road was annexed by the city of Greensboro in 2005. As of December 2020, 35.7 miles (57.5 km) of the loop is open, with 3.86 miles (6.21 km) under construction between North Elm Street and US 29.