In Washington and Colorado, where marijuana has been legalized, marijuana use is even more widespread: Evergreen State College in Olympia ranked No. 3, the University of Colorado at Boulder came in No. 4 (UC was previously No. 1 in 2012), and Colorado College took the No. 13 slot.
http://www.opb.org/news/blog/newsblog/3-oregon-colleges-among-top-20-campuses-for-marijuana-use/
​Full details of the survey can be found at http://www.princetonreview.com/SchoolList.aspx?id=743​