SF cannabis events run on two overlapping calendars: the formal industry circuit (trade shows, B2B summits, awards) and the broader culture-and-lifestyle calendar that overlaps with cannabis (music festivals with on-site cannabis sales, 4/20 gatherings, art-and-cannabis programming, harvest events). Both are anchored in Northern California, and most of them happen within an hour or two of San Francisco — making the city a year-round hub for cannabis-engaged visitors.

Below is the full year as it tends to play out, with notes on which events have been consistent, which have paused or moved, and which work as cannabis-paired experiences even when they aren't formally cannabis events. One caveat: dates, permits, and event status change. Verify the current-year details before planning a trip around any specific event below.

Spring: 4/20 season

The cannabis calendar's emotional center is the week of April 20. Whether the city has permitted a formal 4/20 Hippie Hill event in any given year (the official festival has been paused since 2022), the date drives a measurable spike in dispensary traffic, promotional pricing, and event programming around the Bay Area. What's happening in any given April:

• Hippie Hill / Robin Williams Meadow on 4/20 itself — informal gathering in years without a city permit, full festival in permitted years. Our Hippie Hill 4/20 guide covers the latest event status and what to expect on the day.
• Dispensary 4/20 promotions — most SF dispensaries (including ours) run 4/20 promotions across the day. Inventory moves fast; go early.
• Brand activations and pop-ups — Bay Area cannabis brands frequently host one-day pop-ups at galleries, lounges, and consumption-licensed spaces around 4/20. Watch local press and brand newsletters for current-year listings.

Summer: festivals, Stern Grove, Outside Lands warm-up

Summer in San Francisco is anti-climactic for cannabis events specifically — the calendar is warm-up to the August anchor — but the broader music-and-culture calendar has cannabis compatibility built in:

• Stern Grove Festival (Sundays at Stern Grove, June through August) — free, classical and jazz weighted, one of the best low-key cannabis-paired afternoons in the city. Consume before you go (public consumption is illegal in California parks).
• SF Pride (last Sunday of June) — the parade and Civic Center festival overlap with strong neighborhood cannabis cultural presence in the Castro, where the activist roots of SF dispensary culture started.
• North Beach Festival, Haight-Ashbury Street Fair (June) — neighborhood-scale street fairs with strong cannabis-tolerant vibes, though no on-site sales.

August: Outside Lands, Grass Lands

Outside Lands in early-to-mid August at Golden Gate Park is the city's biggest annual cannabis-engaged event — and was the first major US music festival to legally sell cannabis on-site, in the 'Grass Lands' section, beginning in 2018. The festival itself is three days, two weekends after Lollapalooza in Chicago. Grass Lands functions as a smaller festival-within-the-festival: licensed cannabis vendors, on-site consumption areas, cannabis-themed programming, and educational sessions.

Grass Lands is the only consistent on-site legal cannabis consumption event of the SF year. Tickets to the broader festival are required to access it. Cannabis pairings for the music side of Outside Lands are covered in our SF art and music cannabis guide.

October: Hardly Strictly Bluegrass and harvest

October is the year's other major SF outdoor music event: Hardly Strictly Bluegrass at Speedway Meadow in Golden Gate Park, the first weekend of October. Three days of Americana, bluegrass, and country-adjacent music; free, no tickets, deeply cannabis-friendly culture though no on-site sales. The festival sits at the western end of Golden Gate Park, near the de Young and the Music Concourse — see the SF Rec & Park calendar for current-year details.

October is also peak NorCal cannabis harvest. Most outdoor growers in Mendocino, Humboldt, and Trinity counties harvest in late September and October, and the freshest sun-grown flower of the year hits SF dispensary shelves in November and December. Watching the California Street Cannabis pre-rolls and edibles categories through the fall gives you the clearest sense of what this season is producing.

November–December: Emerald Cup, year-end industry events

The Emerald Cup is Northern California's biggest annual cannabis competition, founded in 2003, traditionally held in early-to-mid December at the Sonoma County Fairgrounds in Santa Rosa. The event combines a public expo (open to anyone 21+), a competition with juried awards across flower, concentrate, edibles, and topical categories, and an industry conference component. The Emerald Cup is the closest thing California cannabis has to a Westminster Dog Show — the awards genuinely shape the next year's NorCal release calendar.

Hall of Flowers, the regional B2B trade show, runs in Sonoma in spring and Palm Springs in fall — public access is limited, but the brands that show strongly there land on SF dispensary shelves in the months following. The year's industry-side narrative tends to consolidate at these two events.

Year-round: lounges, galleries, smaller programming

Outside the headline events, SF has a quiet year-round cannabis programming layer:

• Licensed consumption lounges host occasional cannabis-paired tastings, comedy nights, and brand activations. Lounges open and close — current-year list is on the SF Office of Cannabis page.
• Gallery and art-cannabis programming pops up around First Thursdays, First Fridays, and during major art events. SF Mural Festival editions in some years include cannabis industry sponsorship.
• Wellness, yoga, and education-leaning cannabis events (microdose seminars, terpene tastings, COA reading workshops) run monthly at various venues. Local press and newsletters track the calendar.

California public-consumption law applies citywide outside of permitted festival areas and licensed lounges. Our SF cannabis consumption etiquette guide covers where consumption is and isn't legal in San Francisco.

Frequently asked questions

What's the biggest cannabis event in San Francisco?

The two contenders are Outside Lands' Grass Lands section (early-to-mid August at Golden Gate Park) and the Hippie Hill 4/20 festival in years when the city has issued a permit. Outside Lands has been more consistent in recent years; Hippie Hill in its 2017–2019 era was bigger but has been paused since 2022.

Are SF cannabis events 21+ only?

Yes for any event with on-site cannabis sales or consumption — California's regulatory framework requires 21+ for adult-use cannabis purchase or possession. Music festivals like Outside Lands accept all-ages attendance for the broader festival but restrict the cannabis-licensed Grass Lands section to 21+ with valid government ID.

Where can I see a current-year SF cannabis events calendar?

There's no single official source. The most reliable approach: check Outside Lands' announcement page in spring for festival dates, the Emerald Cup site in fall for December dates, the SF Rec & Park calendar for Hippie Hill 4/20 status, and local cannabis press (Leafly's SF coverage, Eater SF for food-and-cannabis programming) for monthly updates.

Plan your trip

Pick up edibles and pre-rolls before any of the events above from the California Street Cannabis location closest to where you're staying — 615 Sansome St for downtown and the Embarcadero, 235 Clement St for the Inner Richmond and Golden Gate Park's western edge. For the broader cultural context, see our SF cannabis culture guide.

Compliance

For use only by adults 21 years of age and older. Keep out of reach of children. Cannabis can impair concentration, coordination, and judgment. Do not operate a vehicle or machinery under the influence.

California Street Cannabis at Sansome | CA DCC License C10-0001117-LIC | 615 Sansome St, San Francisco, CA 94111. License status verifiable at the California Department of Cannabis Control.

Visit San Francisco maintains the city's official tourism information.