Flattop Mountain is a mountain in the North Carolina High Country, at the village of Sugar Mountain.

Linville Ridge Golf and Country Club is open late Spring to early Fall; it is situated on the summit of Flattop Mountain.

The peak is on the Continental Divide, flanked by Flattop Mountain to the north and Otis Peak to the south.

The trailhead is likewise the primary access to Flattop Mountain, the most hiked peak in the state.

Trending roughly westward, it flows along the north flank of Flattop Mountain.

The river begins in the slopes of Peak Mountain, Sugar Mountain and Flattop Mountain, in the Linville Gap (area also known as Tynecastle).

The trail runs from the North Inlet feeder into Grand Lake, up 11.5 miles to Flattop Mountain.

Glaciation has not entirely destroyed the ancient Flattop Peneplain, named for Flattop Mountain in Grand County.

The trail begins at 9500 feet of elevation at Bear Lake and climbs Flattop Mountain to a maximum elevation of 12,324 feet on the Continental Divide.

The state highway briefly follows Laurel Creek through the Freestone Valley before ascending Flattop Mountain near Tannersville.