The watershed encompasses approximately in portions of
La Porte County, Indiana, and
Berrien County, Michigan. The main branch of the Galien rises from the outflow of Dayton Lake in the northwest corner of
Bertrand Township and flows west to the village of
Galien, Michigan. It then flows northwest into
Weesaw Township and north to near
New Troy, where it is joined by the East Branch and begins to flow west and then southwest to New Buffalo. Agriculture is the dominant land use in the watershed and the majority of the water bodies have been dredged or channelized to facilitate the rapid conveyance of water from the relatively flat landscape. Tributaries (from the mouth): • South Branch Galien River, rises just north of the stateline with Indiana and flows mostly north until joining the main branch north of New Buffalo • Nokmes Creek (as of 2014. Was "Squaw."), rises south of New Buffalo and flows north around the east side of town • Blood Run, rises in Springfield Township in
LaPorte County, Indiana, and flows north and east •
Spring Creek, rises in Hudson Township in the northeast corner of LaPorte County, flows north into
Galien Township then east into
Three Oaks Township and south into the South Branch on the Michigan-Indiana border •
Galena River, rises in LaPorte County, Indiana, near
Springville • Kirktown Creek, rises in
Lake Township and flows mostly south into the main branch west of New Troy • East Branch Galien River, rises from the outflow of several lakes in western Buchanan Township • Blue Jay Creek, rises in southeast Weesaw Township and flows northwest to the main branch in eastern Weesaw • Dowling Creek, rises on the southern edge of Galien Township, near the Indiana border where LaPorte and
St. Jospeph counties meet. • Beaverdam Creek, rises in southwest Galien Township. ==See also==