Pinnacle is an unincorporated community and census-designated place (CDP) in Flathead County, Montana, United States. It is in the eastern part of the county, along U.S. Route 2 in the valley of the Middle Fork Flathead River. It is north of Essex and southeast of West Glacier. The community is bordered to the east, across the Middle Fork, by Glacier National Park, and to the west by Flathead National Forest.
