Description
In the Bitterroot Mountains, heads on Toboggon Hill, flows NNE to Kelly Creek, 1.8 km (1.1 m) W of Kellys Thumb and 64.4 km (40 mi) SW of Missoula, Montana.
History
Named for John Adam Grasser (1885-1954), who operated an outfitter and guide service in the area from 1929 to 1952.