Highway 124 was less than 1 mile in length and followed Lake Avenue, the main street through the city of Paynesville.

Up to Highway 23, Lake Avenue was the original routing of Highways 4 and 55 through Paynesville until 1953 when a new alignment was built, bypassing the main part of town to the south.

The entire route was located in Stearns County.

Highway 124 remained part of the state highway system until 2002, when it was turned back to Stearns County maintenance as an extension of County State Aid Highway (CSAH) 66.

The entire route was in Paynesville, Stearns County.