Saturday Market
Head downtown to the riverfront on saturdays for a local farmer's market that includes many organic options. oregon berries are a can't miss treat.
Darkside Theater
Although corvallis is a small community the residents support independent thought and movies.
Corvallis Riverwalk
And enjoy a lovely walk along the willamette river.
OSU Sporting Events
(http://oregonstate.edu/at...) many sports to choose from. in particular, if you've never been to an american football game then attending a beaver football game might be fun. the game day atmosphere on campus is absolutely electric. buying tickets in advance is advisable.
Movies
The best places to go for run-of-the-mill blockbusters are the carmike cinemas (http://www.carmike.com/) or the regal cinemas (http://www.fandango.com/t...) on 9th st. if you bring your student id you can get in to either location for $6. there is also the dark side cinema (http://www.darksidecinema.com/) downtown, which offers more challenging fare in a small theater setting.