Minnesota State Highway 99 (MN 99) is a 40.098-mile-long (64.531 km) highway in south-central Minnesota, which runs from its intersection with State Highway 111 in Nicollet and continues east to its eastern terminus at its intersection with State Highway 21 in Erin Township, near the city of Faribault.

Quick Facts Trunk Highway 99, Route information ...

Trunk Highway 99
MN 99 highlighted in red
Route information
Maintained by MnDOT
Length	40.098 mi (64.531 km)
Existed	1933–present
Tourist routes	Minnesota River Valley Scenic Byway
Major junctions
West end	MN 111 at Nicollet
Major intersections	US 169 / MN 22 at St. Peter MN 112 at Le Center MN 13 at Montgomery Township
East end	MN 21 at Erin Township
Location
Country	United States
State	Minnesota
Counties	Nicollet, Le Sueur, Rice
Highway system
Minnesota Trunk Highway System Interstate US State Legislative Scenic
← MN 97 → MN 100

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MN 99 passes through the cities of St. Peter and Le Center.

Highway 99 serves as an east–west route in south-central Minnesota between Nicollet, St. Peter, Cleveland, Le Center, and Faribault.

The route is also known as 3rd Street in the town of Nicollet.

Highway 99 follows Minnesota Avenue for 16 blocks in the city of St. Peter. The route is concurrent with U.S. Highway 169 and State Highway 22 throughout this length.

The route crosses the Minnesota River at St. Peter.

Highway 99 is also known as Derrynane Street in the city of Le Center.

Highway 99 was authorized on April 22, 1933.^[1] It was posted in 1934 and included parts of what were previously State Highways 7 and 21. It was paved between Nicollet and Le Center at this time.^[2] The section between Le Center and Highway 13 was paved in 1939,^[3][4] and the last section between Highway 13 and Highway 21 was paved in 1952.^[5][6]

Until the mid-1950s, Highway 99 turned directly north at Cleveland along what is now County Road 15 to intersect Highway 112. A shortcut heading northeast to Le Center was begun in 1953^[7] and completed by 1956.^[8]