Factory Hill, Mountain summit in Wyoming, United States.

Factory Hill is a mountain summit in Wyoming that rises above the surrounding landscape. The peak features several trails and paths that wind through the terrain, providing access to different vantage points across the region.

Factory Hill was labelled Red Mountain by the Hayden surveys early in Yellowstone's history, a name later moved to the range that holds it. In 1885 the Hague Geological Survey gave the peak its present name, taken from Nathaniel P. Langford's 1871 Scribner's account of the Washburn–Langford–Doane Expedition, whose party camped near the south arm of Yellowstone Lake.

The name comes from Nathaniel P. Langford's 1871 account of the Washburn–Langford–Doane Expedition: camped by the south arm of Yellowstone Lake, he saw steam rising in jets from more than fifty craters of the Heart Lake Geyser Basin and likened it to a New England factory village. The Hague Geological Survey adopted the name in 1885.

Factory Hill stands at 9,527 feet (2,904 m) in the Red Mountains, directly north of Mount Sheridan and west of the Heart Lake Geyser Basin. It is reached on foot from the Heart Lake area, so carry a topographic map and compass; the peak has no marked trail or facilities. Snow can linger on the slopes into summer.

Factory Hill takes its name from Nathaniel P. Langford's 1871 description of the Heart Lake Geyser Basin below it: from camp he saw steam rising in jets from more than fifty craters, making the shore look like a New England factory village. The Hague Geological Survey gave the peak that name in 1885. Earlier Hayden surveys had called it Red Mountain, a name later moved to the range.