Marijuana Laws
As recorded December 15, 2025 · not verified as current law. California law
Cannabis laws in San Mateo follow California’s state law. Legal status and penalties are set at the country/state level, not by the city.
Recreational cannabis is legal for adults 21 and older under state law. Medical cannabis is available with a physician recommendation. Cannabis remains illegal under federal law, so legal risk may still exist in certain contexts. Possession up to 28 grams of flower is permitted.
Quick facts
- Recreational: Legal (adults 21+)
- Medical: Available
- Possession: Up to 28g permitted under state law
- Buying/Selling: Legal from licensed retailers
- Tourists: Subject to same rules; federal risks remain
Practical guidance
Avoid cross-border transport of cannabis products. Do not assume informal tolerance equals legality.
Legislative History
California legalized medical cannabis in 1996 via Proposition 215, allowing patients with physician recommendations to possess and cultivate for personal medical use. Recreational cannabis was legalized for adults 21+ in 2016 through Proposition 64, permitting possession of up to 28.5 grams of flower, 8 grams of concentrates, and home cultivation of up to six plants. Licensed retail sales are regulated at the state level, though local jurisdictions may impose additional restrictions.
Law Enforcement
A teenager recalled walking past San Mateo officers while smoking without a word from them. California has since introduced regulated adult use, as covered in Marijuana Laws.
Where to Buy Marijuana
Beresford Skate Park was a place people knew one another. A stranger who looked like a cop could clear it out in a hurry.
Marijuana Prices
Price depended on how well you knew the seller. No amounts were given.
More Information
The skate park was a gathering place, though people were wary of smoking there.