While visiting the Chimpanzee and Human Communication Institute you should take advantage of all that Kittitas County has to offer. Check out the Kittitas County Chamber of Commerce to discover the variety of activities available, including scenic drives, outdoor sports, historical landmarks, and quaint downtowns.
Link to MyEllensburg.com for a list of local attractions and restaurants to consider during your visit to Ellensburg. You can also take a walk downtown and visit Friendship Park, dedicated to Washoe.
And there is Central Washington University's Museum of Culture and Environment.
You'll find a lot of other ideas in the Kittitas Valley's Greatest Hits (PDF).