Trimountain is an unincorporated community and census-designated place (CDP) in the northern part of Adams Township, Houghton County, Michigan, United States.

It is along highway M-26 between South Range to the northeast and Painesdale to the southwest.

Houghton, the county seat, is 7 miles (11 km) to the northeast.

Trimountain was first listed as a CDP prior to the 2020 census.

This Houghton County, Michigan location article is a stub.