Arrests , foul weather dampen The 2003 California State Senate bill that became the law that established medical marijuana in the state was called SB420 . ` ` 420 '' enthusiasm . Crowds turned out , but no one showed up ; few crossed police lines . One man pumps up gas , enters quad alone , is driven away . Boulder 's is one of the biggest pro - pot rallies on cryptic grounds .
Arrests , foul weather dampen ` ` 420 '' enthusiasm . Crowds turned out , but no one showed up ; few crossed police lines . One man pumps up gas , enters quad alone , is driven away . Boulder 's is one of the biggest pro - pot rallies on cryptic grounds .