[5] The section of highway north of the two M-28 junctions is both a Michigan Scenic Heritage Route and part of the Lake Superior Circle Tour.

[7] North of Moran the roadway runs parallel to the DM&M's abandoned rail right-of-way and passes by the Fred Dye Nature Sanctuary.

Before crossing into Chippewa County, the highway passes through the community of Ozark, home of a rock quarry.

Continuing to the north, the highway is renamed Deerfoot Road and serves the Three Lakes Campground, a unit of the Hiawatha National Forest, before meeting M-28 at Eckerman.

[9] Here it continues northwest to East–West Road and turns to run along the shores of Whitefish Bay and cross the Tahquamenon River near its mouth.

Continuing along the bay as Whitefish Road, M-123 meets the community of Paradise, the northernmost point along the highway.

Continuing east of Paradise, M-123 is the only paved road that serves the Tahquamenon Falls State Park and the Whitefish Point region.

It runs south and west across Murphy Creek and the Auger River before intersecting with H-37 at Four Mile Corner.

[12] The section north to the Tahquamenon River Bridge is remarked on the October 1, 1954 state map as a county road, however.

[16] On November 9, 2007, MDOT expanded the Tahquamenon Scenic Heritage Route designation previously applied to M-123.

This expanded the designation to all of the highway north of M-28, recognizing it for its "outstanding natural beauty" and the scenic views of "rivers, forests, trails and Tahquamenon Falls State Park.