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U.S. Route 77 in Iowa

U.S. Highway 77 marker

U.S. Highway 77
Wesley Parkway
Route information
Maintained by Iowa DOT
Length: 0.315 mi (0.507 km)
Existed: 1929 – present
History: Extended into South Dakota:
1929–mid-1980s
Major junctions
South end: US 77 at the Missouri River at Sioux City
North end: I-29 in Sioux City
Location
Counties: Woodbury
Highway system
Iowa 76 Iowa 78

U.S. Highway 77 marker

U.S. Highway 77 (US 77) is the shortest U.S. Highway in the state of Iowa. It crosses into Iowa over the Missouri River from South Sioux City, Nebraska, at Sioux City and runs approximately three-tenths mile (500 m) to an interchange with Interstate 29 where the road continues north as Wesley Parkway. Like all other state highways in Iowa, the route is maintained by the Iowa Department of Transportation.

US 77 has never been a long route in Iowa. When it was extended into the state in 1929, it only traveled 6 miles (9.7 km) in Sioux City before crossing the Big Sioux River into South Dakota. After I-29 was built in Sioux City during the late 1950s, US 77 was moved onto the new Interstate Highway. At both historic ends of the highway in Iowa, bridge failures have caused US 77 to be detoured around Sioux City. In the mid-1980s, the national end of the highway was moved to the interchange with I-29.

US 77 in Iowa begins on the Siouxland Veterans Memorial Bridge over the Missouri River. It heads north along Wesley Parkway where it comes to an interchange with Interstate 29 (I-29), U.S. Highway 20 Business (US 20 Business), and Iowa Highway 12 (Iowa 12). On either side of the interchange Iowa 12 is an unsigned highway; east of the interchange, the route is signed as US 20 Business, while on the west side it is a duplicate route with I-29. US 20 Business exits Wesley Parkway and briefly overlaps I-29. US 77 ends at the center of the interchange. The entire route is 0.315 mi (1,660 ft; 507 m) long.


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