The highway then follows the St. Croix River until it curves to the west.

It then passes through Eureka Center and a one-mile (1.6 km) concurrency with CTH-G before reaching Cushing, from where it runs one mile (1.6 km) to the west before continuing north.

The highway then passes by a few lakes and the community of Trade River, and then runs east of Fish Lake Wildlife Area.

After the wildlife area's boundary ends, the highway passes through Branstad before terminating with WIS 48 at WIS 70 in Grantsburg.

[4] The highway was unpaved along its entire route and would stay that way until at least 1956.