Colorado's marijuana market boomed in April as tens of thousands celebrated the 4/20 holiday.
Tax collections released Monday showed that Colorado sold about $22 million worth of recreational pot in April. That's an increase of about 17 percent from March, and an increase of about 58 percent from January, the first month of retail sales.
An estimate from the Colorado Department of Revenue showed that Colorado made some $5.3 million from medical and recreational pot taxes and fees in April. That's up from about $5 million in March.
Colorado has made no estimate of 4/20 visitors. But pot shops in Denver had long lines the whole weekend, and at least 30,000 flocked to a city park to mark the once-underground marijuana celebration.