Charles Larpenteur.
Fort Alexander was a fur trading post in Montana. Fur traders Charles Larpenteur and Alexander McKenzie established it in 1842 for the American Fur Company to replace Fort Van Buren, about 20 miles downstream.
The 100-foot square stockaded post was named for Alexander Culbertson, another fur trader. It was located on the North bank of the Yellowstone River, opposite the mouth of the Rosebud River. The Blackfeet Indians, who opposed its construction, called it Fort Crow as an insult. They abandoned it in 1850 in favor of Fort Sarpy. It was burned down when it was abandoned in 1850, and no trace remains.
The trading post was located near Forsyth, Montana.
By Kathy Alexander/Legends of America, updated October 2026.
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