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The 4:20 pm smoke out during the annual 420 Rally at Civic Center Park in downtown Denver April 20, 2013 Denver, Colorado. (Photo By Joe Amon/The Denver Post) ( CD20420RALLY_JA12510 )

Chad hitting his bong during the 4:20 pm smoke out during the annual 420 Rally at Civic Center Park in downtown Denver April 20, 2013 Denver, Colorado. (Photo By Joe Amon/The Denver Post) ( CD20420RALLY_JA12668 )

Poet Len Chernila during the annual 420 Rally at Civic Center Park in downtown Denver April 20, 2013 Denver, Colorado. (Photo By Joe Amon/The Denver Post) ( CD20420RALLY_JA12002 )

Henry Hemp lighting up with Dreseta Anderson from Oklahoma that came for the weekend of the annual 420 Rally at Civic Center Park in downtown Denver April 20, 2013 Denver, Colorado. (Photo By Joe Amon/The Denver Post) ( CD20420RALLY_JA10356 )

Michael Cercone and Richard Deanda juggling at the annual 420 Rally at Civic Center Park in downtown Denver April 20, 2013 Denver, Colorado. (Photo By Joe Amon/The Denver Post) ( CD20420RALLY_JA20923 )

Bongo Love finishing a pot leaf ice sculptuer as it gets close to 4:20 at the annual 420 Rally at Civic Center Park in downtown Denver April 20, 2013 Denver, Colorado. (Photo By Joe Amon/The Denver Post) ( CD20420RALLY_JA12161 )

Kylee Thorson of Denver lighting up at the annual 420 Rally at Civic Center Park in downtown Denver April 20, 2013 Denver, Colorado. (Photo By Joe Amon/The Denver Post) ( CD20420RALLY_JA11883 )

Juanita Powless of Wisconsin during the 4:20 pm smoke out during the annual 420 Rally at Civic Center Park in downtown Denver April 20, 2013 Denver, Colorado. (Photo By Joe Amon/The Denver Post) ( CD20420RALLY_JA12593 )

Deveni Garcia of Denver during the 4:20 pm smoke out during the annual 420 Rally at Civic Center Park in downtown Denver April 20, 2013 Denver, Colorado. (Photo By Joe Amon/The Denver Post) ( CD20420RALLY_JA12760 )

DENVER, CO. - APRIL 20TH: Thousands gather in Civic Center Park and light up for "420" day Saturday afternoon, April 20th, 2013. (Photo By Andy Cross/The Denver Post) ( CD21420DAY_14972 )

DENVER, CO. - APRIL 20 : Rap musician Don Smoothiano celebrates 4/20 at the stage of Civic Center Park in Denver. A crowd of marijuana smokers gathered at the park to mark the counterculture holiday known as 4/20 on the first celebration since Colorado and Washington made pot legal for recreation use. (Photo By Hyoung Chang/The Denver Post) ( 420marijuanaHC1_0829 )

DENVER, CO. - APRIL 20 : A crowd of marijuana smokers celebrate the counterculture holiday known as 4/20 on the first celebration since Colorado and Washington made pot legal for recreation use. (Photo By Hyoung Chang/The Denver Post) ( 420marijuanaHC1_1181 )

DENVER, CO. - APRIL 20 : A crowd of marijuana smokers celebrate the counterculture holiday known as 4/20 on the first celebration since Colorado and Washington made pot legal for recreation use. (Photo By Hyoung Chang/The Denver Post) ( 420marijuanaHC1_1215 )

Counting down to 4:20 during the annual 420 Rally at Civic Center Park in downtown Denver April 20, 2013 Denver, Colorado. (Photo By Joe Amon/The Denver Post) ( CD20420RALLY_JA21399 )

DENVER, CO. - APRIL 20 : Amy McBain of Evergreen, left, and Kim Logsdon of Denver celebrate 4/20 at Civic Center Park in Denver. A crowd of marijuana smokers gathered at the park to mark the counterculture holiday known as 4/20 on the first celebration since Colorado and Washington made pot legal for recreation use. (Photo By Hyoung Chang/The Denver Post) ( 420marijuanaHC1_1039 )

DENVER, CO. - APRIL 20 : A crowd of marijuana smokers gathered at Civic Center Park in Denver to mark the counterculture holiday known as 4/20 on the first celebration since Colorado and Washington made pot legal for recreation use. (Photo By Hyoung Chang/The Denver Post) ( 420marijuanaHC1_0796 )

DENVER, CO. - APRIL 20 : A crowd of marijuana smokers gathered at Civic Center Park in Denver to mark the counterculture holiday known as 4/20 on the first celebration since Colorado and Washington made pot legal for recreation use. (Photo By Hyoung Chang/The Denver Post) ( 420marijuanaHC1_1025 )

DENVER, CO. - APRIL 20 : Todd Jacko of Denver, front, and a crowd of marijuana smokers gathered at the park to mark the counterculture holiday known as 4/20 on the first celebration since Colorado and Washington made pot legal for recreation use. (Photo By Hyoung Chang/The Denver Post) ( 420marijuanaHC2_9226 )

DENVER, CO. - APRIL 20 : A crowd of marijuana smokers celebrate the counterculture holiday known as 4/20 on the first celebration since Colorado and Washington made pot legal for recreation use. (Photo By Hyoung Chang/The Denver Post) ( 420marijuanaHC1_1146 )

DENVER, CO. - APRIL 20 : John Condon of Denver is selling the t-shirts at Civic Center park in Denver. A crowd of marijuana smokers gathered at the Park of Denver to mark the counterculture holiday known as 4/20 on the first celebration since Colorado and Washington made pot legal for recreation use. (Photo By Hyoung Chang/The Denver Post) ( 420marijuanaHC2_9247 )

Civic Center Park starts to fill up with more visitors around noon. (Joe Amon/The Denver Post) ( photo (1) )

DENVER, CO. - APRIL 20 : 4/20 pipes are sold at Civic Center Park in Denver. A crowd of marijuana smokers gathered at the park of Denver to mark the counterculture holiday known as 4/20 on the first celebration since Colorado and Washington made pot legal for recreation use. (Photo By Hyoung Chang/The Denver Post) ( 420marijuanaHC2_9121 )

DENVER, CO. - APRIL 20 : Triana Rice is body painted by artist Sophia Rose for the celebration of 4/20 at Civic Center Park in Denver. A crowd of marijuana smokers gathered at the park to mark the counterculture holiday known as 4/20 on the first celebration since Colorado and Washington made pot legal for recreation use. (Photo By Hyoung Chang/The Denver Post) ( 420marijuanaHC2_9153 )

DENVER, CO. - APRIL 20 : Joby Weeks of Denver celebrates 4/20 at Civic Center Park in Denver. A crowd of marijuana smokers gathered at the park to mark the counterculture holiday known as 4/20 on the first celebration since Colorado and Washington made pot legal for recreation use. (Photo By Hyoung Chang/The Denver Post) ( 420marijuanaHC1_1029 )

DENVER, CO. - APRIL 20 : A crowd of marijuana smokers celebrate the counterculture holiday known as 4/20 on the first celebration since Colorado and Washington made pot legal for recreation use. (Photo By Hyoung Chang/The Denver Post) ( 420marijuanaHC2_9683 )

Pipes being set up at the Purpl Haze booth for the 420 Rally at Civic Center Park. (Joe Amon/The Denver Post) ( photo (4) )

Smoking at the 420 Rally at Civic Center Park. (Joe Amon/The Denver Post) ( photo (2) )

420 Rally organizer Miguel Lopez lights up during his rounds as the rally begins. (Joe Amon/The Denver Post) ( photo (3) )

DENVER, CO. - APRIL 20 : Rap musician Don Smoothiano celebrates 4/20 at the stage of Civic Center Park in Denver. A crowd of marijuana smokers gathered at the park to mark the counterculture holiday known as 4/20 on the first celebration since Colorado and Washington made pot legal for recreation use. (Photo By Hyoung Chang/The Denver Post) ( 420marijuanaHC2_9197 )

DENVER, CO. - APRIL 20 : A crowd of marijuana smokers celebrate the counterculture holiday known as 4/20 on the first celebration since Colorado and Washington made pot legal for recreation use. (Photo By Hyoung Chang/The Denver Post) ( 420marijuanaHC1_1160 )

DENVER, CO. - APRIL 20 : Cameron Kieffer, 23, of Broomfield and a crowd of marijuana smokers celebrate the counterculture holiday known as 4/20 on the first celebration since Colorado and Washington made pot legal for recreation use. (Photo By Hyoung Chang/The Denver Post) ( 420marijuanaHC1_1265 )

DENVER, CO. - APRIL 20 : Nick, left, and Andrea and a crowd of marijuana smokers celebrate the counterculture holiday known as 4/20 on the first celebration since Colorado and Washington made pot legal for recreation use. (Photo By Hyoung Chang/The Denver Post) ( 420marijuanaHC2_9441 )

Gearing up for the 420 Rally at Denver's Civic Center Park. (Joe Amon/The Denver Post) ( photo6 )