 After passing through Richford at CTH B, WIS 21 gradually curves northward to junction with CTH Y - where it turns sharply eastward and junctions with WIS 22 and WIS 73 north in Wautoma.WIS 21 follows WIS 73 south for two miles (3 km) before turning east again of the concurrency near Silver Lake.WIS 152 junctions with the routes about two miles (3 km) northwest of the eastern concurrency terminus.