Looking for a college campus where a majority of students support legalizing marijuana? Search no more.

The University of Colorado -- Boulder takes this year's top slot for colleges with "Reefer Madness" in the Princeton Review's annual rankings.

CU Boulder was host to a clash between students and the administration over its annual 4/20 smoke-out, in which the university used "stinky fish fertilizer" to keep pot smokers off its grassy quad. It also closed the entire campus on April 20, 2012 to visitors in an effort to thwart the popular weed event.

In 2011, more than 10,000 people gathered on the university's campus for a smoke and demonstration for legalizing marijuana, the AP reports.

Other top colleges on the Princeton Review list primarily included schools from Oregon, New York and California.

Check out the top 20 in the slideshow below:

Loading Slideshow...

  • 20. Reed College

    Portland, Ore. Photo Cred:<a href="http://en.wikipedia.org/wiki/File:Reedcollege.jpg" target="_hplink"> Kelvin Kay</a>

  • 19. Grinnell College

    Grinnell, Iowa Photo Cred:<a href="http://en.wikipedia.org/wiki/File:Grinnell_College_MacEachron_Field.JPG" target="_hplink"> Aureliusxv</a>

  • 18. Sarah Lawrence College

    Bronxville, N.Y. Photo Cred: <a href="http://en.wikipedia.org/wiki/File:Marshall_Field.JPG" target="_hplink">JVolkBlum</a>

  • 17. Ithaca College

    Ithaca, N.Y. Photo Cred:<a href="http://en.wikipedia.org/wiki/File:ICtextorball.JPG" target="_hplink"> Mr Senseless</a>

  • 16. Guilford College

    Greensboro, N.C. Photo Cred: <a href="http://en.wikipedia.org/wiki/File:Guilfordcollegewalkway.jpg" target="_hplink">Parkram412</a>

  • 15. University of Vermont

    Burlington, VT Photo Cred: <a href="http://en.wikipedia.org/wiki/File:UVM_Old_Mill_building_20040101.jpg" target="_hplink">Jared C. Benedict</a>

  • 14. Colorado College

    Colorado Springs, Colo. Photo Cred: <a href="http://en.wikipedia.org/wiki/File:EdithKinneyGaylordCornerstoneArtsBldg-TimothyHursley.jpg" target="_hplink">Timothy Hursley</a>

  • 13. Lewis & Clark College

    Portland, Ore. Photo Cred: <a href="http://commons.wikimedia.org/wiki/File:Aubrey_Watzek_Library_at_Lewis_and_Clark_College_-_Portland,_Oregon.jpg" target="_hplink">M.O. Stevens</a>

  • 12. West Virginia University

    Morgantown, W.V. Photo Cred: <a href="http://commons.wikimedia.org/wiki/File:Woodburn-circle-aerial.jpg" target="_hplink">Wvuuam</a>

  • 11. Bard College

    Annandale-on-Hudson, N.Y. Photo Cred: <a href="http://commons.wikimedia.org/wiki/File:Bard_College_-_IMG_8011.JPG" target="_hplink">Daderot</a>

  • 10. University of California--Santa Barbara

    Santa Barbara, Calif. Photo Cred: <a href="http://en.wikipedia.org/wiki/File:Ucsbuniversitycenterandstorketower.jpg" target="_hplink">Coolcaesar</a>

  • 9. State University of New York--Purchase College

    Purchase, N.Y. Photo Cred:<a href="http://en.wikipedia.org/wiki/File:Artscenter.JPG" target="_hplink"> Nashvilleneighbor</a>

  • 8. New York University

    New York, N.Y. Photo Cred: <a href="http://commons.wikimedia.org/wiki/File:NYU07.JPG" target="_hplink">Jonathan71</a>

  • 7. Warren Wilson College

    Asheville, N.C. Photo Cred: <a href="http://en.wikipedia.org/wiki/File:Farm_copy.jpg" target="_hplink">Patrick Addabbo</a>

  • 6. The Evergreen State College

    Olympia, Wash. Photo Cred:<a href="http://en.wikipedia.org/wiki/File:Evergreen_Seminar_2_bldg.jpg" target="_hplink"> Goldom</a>

  • 5. Green Mountain College

    Killington, Vt. Photo Cred: GMC's Facebook<a href="http://www.facebook.com/photo.php?fbid=10151023996622865&set=a.191102777864.121814.137783307864&type=3&theater" target="_hplink">GMC's Facebook</a>

  • 4. Skidmore College

    Saratoga Springs, N.Y. Photo Cred: <a href="https://www.facebook.com/photo.php?fbid=1457159635104&set=o.9734378857&type=3&theater" target="_hplink">Skidmore's Facebook</a>

  • 3. Eckerd College

    St. Petersburg, Fla. Photo Cred: <a href="http://en.wikipedia.org/wiki/File:PHA-Library.jpg" target="_hplink">Eckwriter</a>

  • 2. University of California--Santa Cruz

    Santa Cruz, Calif. Photo Cred: <a href="http://en.wikipedia.org/wiki/File:UCSC_%26_Santa_Cruz_Aerial_view.jpg" target="_hplink">Doc Searls</a>

  • 1. University of Colorado-Boulder

    Boulder, Colo. Photo Cred: <a href="http://en.wikipedia.org/wiki/File:Mackey_Auditorium_-_Colorado.jpg" target="_hplink">MECU</a>