WordNet (r) 3.0 (2006):

Sun River
    n 1: a river in western Montana that flows south and east to
         join the Missouri River

U.S. Gazetteer Places (2000):

Sun River, MT -- U.S. Census Designated Place in Montana
   Population (2000):    131
   Housing Units (2000): 65
   Land area (2000):     1.814117 sq. miles (4.698540 sq. km)
   Water area (2000):    0.000000 sq. miles (0.000000 sq. km)
   Total area (2000):    1.814117 sq. miles (4.698540 sq. km)
   FIPS code:            72475
   Located within:       Montana (MT), FIPS 30
   Location:             47.531915 N, 111.729648 W
   ZIP Codes (1990):     59483
   Note: some ZIP codes may be omitted esp. for suburbs.
   Headwords:
    Sun River, MT
    Sun River