Mosenthein Island
Mosenthein Island, situated approximately due north of the Gateway Arch in St. Louis, Missouri, and approximately south of the confluence of the Missouri River and Mississippi River, is one of a cluster of three islands: Chouteau Island, Gabaret Island, and Mosenthein Island. Mosenthein Island is 1,077 acres in area. The island is mainly bottomland forest. It is only accessible by boat. It is a popular spot to camp and canoe.