Top "Reefer Madness" schools:

1. University of Colorado at Boulder

2. University of California at Santa Cruz

3. Eckerd College, St. Petersburg, Fla.

4. Skidmore College, Saratoga Springs, N.Y.

5. Green Mountain College, Poultney, Vt.

Source: The Princeton Review

Despite the University of Colorado's success in dramatically downsizing the scale of this year's 4/20 marijuana smoke-out, the Boulder campus today shot to the top of the Princeton Review's "Reefer Madness" list.

Last year, Colorado College in Colorado Springs topped the pot list, while CU moved up from No. 6 to No. 4. Colorado College slipped to No. 14 this year.

CU officials, determined to stop the 10,000 pot smokers who have assembled on Norlin Quad each April 20 for the past few years, took unprecedented steps this year to stop the smoke-out, including closing the campus to outside visitors. This year's event drew fewer than 1,000 people.

Bronson Hilliard, spokesman for CU-Boulder, said the 4/20 crackdown wasn't an effort to get the campus off the Princeton Review's "Reefer Madness" list. Rather, it was to minimize disruptions for students and employees.

Hilliard said CU doesn't take such lifestyle surveys seriously.

The Princeton Review's rankings are in the 2013 edition of "The Best 377 Colleges," which goes on sale Tuesday. There are 62 ranking lists, each based on surveys of 122,000 students during the last school year. Students answered 80 questions about academics, administration, campus life, the student body and themselves.

The education services company's most famous list is its ranking of top party schools. This year, West Virginia University is back on top for the first time in five years, bumping off Ohio University to reclaim its title as the nation's No. 1 party school.

CU-Boulder, which ranked No. 1 on Playboy magazine's party-school list last year, is not on the newest Princeton Review list.

WVU hasn't held the top spot since 2007, but the rankings announced Monday by The Princeton Review make it the third time. WVU was also No. 1 in 1997, and it's been among the top 20 party schools 12 times in the 21 years the rankings have been published.

CU had appeared on the Princeton list last year (at No. 16) and in 2010 (at No. 11). But the Boulder school dropped out of the rankings entirely this year. Only one Pac-12 Conference school was ranked — Arizona State at No. 17.

The Princeton Review is an education services company known for its test-prep courses, tutoring, books, and other student resources. Headquartered in Framingham, Mass., it's a private company that is not affiliated with Princeton University.

The Denver Post and The Associated Press contributed to this report.