Trailways runs regular bus routes from Spokane.
Pullman is served by the Pullman-Moscow Regional airport.
Since there is not much to the downtown area, transportation is a must. Public transportation is available from Pullman Transit, though it is often geared towards the university. Pullman also has multiple bike trails for summer travel around the town.
Being the home of a major state university, there are many WSU centric activities available
Washington State University
WSU is trying to collect many of the sights around campus in one website titled Around WSU. These are a selection (and maybe a few that have been forgotten)
The Bears (WSU Grizzly Research) - One common sight is the Grizzly Bear research facility on Airport road. The bears usually come out of hibernation around March, and you can see them in their outdoor facility