Ah...I guess bycycle gets confused with the Washington destination.
It looks like Clark College is just over the I-5 bridge. There is a multi-use path on the sides of the I-5 bridge. Getting to it safely is a bit confusing if you've never done it before. Here is a video that describes the process of getting from that area in Vancouver to N Portland:
http://www.youtube.com/watch?v=wWxY1dohFp0
You will want to modify these instructions a bit so you end up going North over the I-5 bridge on the East side. But what's nice is you can see landmarks that might not be described well on individual maps.
Scott