The General Jesup was a steamboat that was launched on what river that starts in the Rocky Mountains?
General Jesup (sidewheeler): General Jesup was a side-wheel paddle-steamer, named for General Thomas Jesup then Quartermaster General of the United States Army, and was the second steamboat launched on the Colorado River, in 1854. Colorado River:  Starting in the central Rocky Mountains in the U.S., the river flows generally southwest across the Colorado Plateau and through the Grand Canyon before reaching Lake Mead on the Arizona–Nevada border, where it turns south toward the international border.
Colorado River