Once the province of activists and stoners, the traditional pot holiday of April 20 has gone mainstream in the first state in the nation to legalize recreational marijuana.
High times returns to the mile high city for the fourth annual Cannabis Cup.
Keeping Civic Center Park safe this weekend is a high priority for law enforcement after the celebration was cut short when shots rang out last year.
A crowd of marijuana smokers expected to swell to 80,000 gathered Saturday 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.
Thousands of people are expected to join an unofficial counterculture holiday celebrating marijuana in Colorado and Washington this coming weekend, including out-of staters and even packaged tours.