Last names starting with "O"
- Michael Obland
- Erik Oconnor
- Class of 1989 Bobbi Ann Old Crow
- Class of 1982 Lisa Old Mouse
- Class of 1989 Bobbi Ann Oldcrow
- Class of 1980 Todd Olmstead
- Class of 1999 Troy Olson
- Class of 2012 John Onebear
- Class of 1976 Roxanna Onebear
- Class of 1972 Ray Osborne
- Class of 1982 Vernon Otherbull
- Class of 2008 Cassia Oxford
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About the Colstrip High School Alumni Directory
Check out all of the names of the Colstrip High School alumni that attended high school in Colstrip that are listed above. Registering will allow you to join the directory. If you haven't already, we also encourage you to register for free on this site. You may also want to check out the latest news and school memories.