University of Portland to Oregon State University buses and trains from $27

Here are some trips other travelers have found on Routefriend.
$27
3h 19m
1 stop
Amtrak
$36
8h 30m
2 stops
Greyhound Amtrak
$36
8h 30m
2 stops
Greyhound Amtrak
$71
9h 4m
2 stops
Greyhound Amtrak
$108
13h 55m
3 stops
Amtrak Amtrak