Long Branch is a stream in Boone, Audrain and Monroe counties of the U.S. state of Missouri.
[1] It is a tributary of the Salt River within the waters of Mark Twain Lake.
[2] The stream source is in northeast Boone County about 1.5 miles west of Centralia at 39°12′31″N 92°10′16″W / 39.20861°N 92.17111°W / 39.20861; -92.17111.
The stream turns east and generally follows the Audrain-Monroe county line for approximately 17 miles.
Then the stream turn north and passes west of Santa Fe for about 3.5 miles to its confluence with the Salt River,[3] at 39°24′10″N 91°49′17″W / 39.40278°N 91.82139°W / 39.40278; -91.82139.