California cannabis culture deserves a map with more than one city circled on it. A museum in Willits, a Sacramento trade floor and a San Diego research conference each reveal something different. Add San Francisco festival grounds and a Los Angeles hash gathering, and the picture gets wider.
These are our picks for cannabis events in California because they offer five distinct reasons to show up. The selection spans regional history, retail relationships, music, glass and research. “Top” means an editorial shortlist here, with a clear purpose behind each inclusion.
Dates were checked on October 13, 2026. Some selections remain ahead this fall; others are past editions worth understanding for future planning. Outside Lands has announced its 2027 festival dates, while several next-edition details remain unconfirmed. Start with the region and experience that interest you, then read the specific organizer page.
Header image: An archive discussion scene from High Rise’s event photo archive. The photograph does not document any of the editions listed below.
Five California stops, five different experiences
- Willits: Behind the Redwood Curtain at Mendocino County Museum, scheduled to close November 28, 2026. Our pick for cannabis history and regional context.
- Sacramento: Hall of Flowers, November 4–5, 2026. Our pick for eligible industry attendees focused on retail and brand discovery.
- San Francisco: Grass Lands at Outside Lands. The 2026 festival ran August 7–9; Outside Lands has announced August 6–8, 2027, with the next cannabis program still to verify.
- Los Angeles: Puffcon’s October 3–4, 2026 edition has passed. Our pick for exploring the connection between hash culture, functional glass and music.
- San Diego: National Cannabis Research Conference, October 19–21, 2026. Our pick for a program centered on research and interdisciplinary discussion.
This is a statewide guide to event formats, rather than a single weekend itinerary. Keep the dates beside the names when sharing the list with friends or colleagues. An event can deserve a place on your radar after its latest edition has ended.
Willits: Behind the Redwood Curtain puts history on the wall
Our northernmost selection takes the conversation into a museum. Behind the Redwood Curtain: Cannabis in California was developed by Mendocino County Museum and Exhibit Envoy, working with local contributors. Its stated focus reaches from the 1970s through legalization in 2016, with stories from the Emerald Triangle and elsewhere in California.
The exhibition brings together historical context and personal experience through images, objects and recorded material. Those formats make room for people and places that can disappear behind a current brand name. Our reason for including it is the chance to spend time with that context.
The museum’s closing-day listing gives November 28, 2026, at its Willits location, 400 East Commercial Street. Exhibit Envoy also describes a touring future starting in spring 2027. Its booking calendar is for institutions; it should not be read as a list of confirmed public opening dates.
Give this visit enough space for reading and listening. Pick one story that challenges what you thought you knew, then follow its source. If you usually meet cannabis through menus or packaging, the museum offers a useful change of pace. Check museum hours for your chosen day before heading north.
Sacramento: Hall of Flowers rewards a specific retail question
Hall of Flowers is scheduled for November 4–5, 2026, at Cal Expo in Sacramento. The Sacramento registration page states that this edition is for industry professionals. That distinction belongs at the start of any travel plan.
The two-day Industry Ticket requires approval and is reserved for verified operators. Its terms exclude agencies, service providers and solicitors from that pass. The November 5 Day 2 ticket is also an industry ticket, although it does not require an application. Retailers can apply for a complimentary pass through the organizer.
Our reason to include Sacramento is the opportunity to organize a visit around real product questions. A buyer comparing packaging formats has a different assignment from a brand introducing a new line. Write down the decision you hope to make before reviewing exhibitors. That gives conversations a useful starting point.
Keep a simple comparison sheet with room for availability, assortment and the next agreed step. Ask for details you can check afterward, and separate a promising introduction from an actual commercial commitment. A crowded booth alone tells you very little about whether a product fits your store.
Our Hall of Flowers guide covers the wider show context. For admission, use the current Sacramento page specifically. Language describing another city or an earlier edition can send you toward the wrong ticket.
San Francisco: Grass Lands adds cannabis to a music festival day
Grass Lands earns its place because it changes the setting around cannabis discovery. It sits inside Outside Lands in San Francisco’s Golden Gate Park, alongside a broader music festival. The 2026 edition is over: the festival’s dated information lists August 7–9.
In its July 28, 2026 program announcement, Outside Lands described a 21+ Grass Lands area with a cannabis marketplace and designated consumption area. The program also included Farm Stands powered by Embarc, food and performances. Those details describe that specific edition, and should stay attached to its year.
The current festival homepage announces August 6–8, 2027. That provides a real future date to watch. It does not confirm a 2027 Grass Lands vendor list, program or access arrangement. Wait for those announcements before treating last summer’s experience as next summer’s promise.
For a future visit, decide how cannabis discovery fits beside the music you want to hear. Leave breathing room between a scheduled set and exploring another part of the grounds. A group can choose a meeting point in advance without forcing everyone onto the same timetable.
Read our feature on Grass Lands and Outside Lands for the larger cultural connection. Our statewide pick rests on the format: cannabis has a defined place within a wider festival experience.
Los Angeles: Puffcon gives glass and hash culture a shared stage
Puffcon’s latest edition ran October 3–4, 2026, in Downtown Los Angeles. Those dates have passed. The organizer’s event page presents a mix of music, glass artists, merchandise, food and community, with Metro Boomin and Action Bronson on the advertised bill.
Puffco’s 2026 event materials also describe live glassblowing and an expanded street marketplace. That combination is why Puffcon belongs in this selection. Functional glass receives attention as creative work, while the music and marketplace give people several ways into the gathering.
For a future edition, we would start with the artists whose work interests us. Look for announced demonstrations, make room for conversation, and give yourself time to compare pieces. If you are mainly there for music, begin with the performance schedule once it is released. Neither plan needs to cover everything.
Admission deserves its own check when the next edition is announced. The 2026 site distinguished Puffco-required Saturday and two-day tickets from Sunday general admission, and identified the event as 21+. Those terms are historical context here. Do not assume the same structure will carry forward.
Our Puffcon history and DTLA feature follows the event in more detail. Keep it on the watchlist for its particular community and creative program. A future date or lineup should come from a fresh organizer announcement.
San Diego: the National Cannabis Research Conference changes the conversation
The National Cannabis Research Conference lists October 19–21, 2026, at the DoubleTree by Hilton in Mission Valley, San Diego. It is hosted by the Institute of Cannabis Research, in conjunction with the National Interdisciplinary Cannabis Symposium.
The organizer frames the meeting around research across science, policy and law, and provides a conference program and daily agenda. That gives this Southern California selection a different role within the guide. The program, rather than a festival lineup or exhibitor floor, is the reason to investigate it.
Start by choosing a question you want to understand more clearly. Review the agenda for sessions that address it, then check the speakers’ backgrounds and subject areas. Leave room in your notes for what a presentation establishes, what it leaves open, and which original work you want to read afterward.
That habit matters when research becomes a conversation outside the conference room. A compelling talk can prompt better questions without settling every question about its subject. Save the title or reference of work you want to revisit, and keep your notes connected to that source.
Our reason for including San Diego is straightforward: a statewide cannabis calendar should make room for serious inquiry. Review registration and the final program before committing your time. An event’s cannabis focus alone does not tell you whether its sessions match your interests.
Build a California calendar you can actually use
Put these selections into three calendar groups: remaining 2026 dates, completed editions, and announced future dates. Willits, Sacramento and San Diego still offer dated plans as of this guide’s research day. Puffcon belongs in the completed group. Outside Lands offers a 2027 festival date with cannabis details still to come.
Choose one regional stop first, then decide whether a second visit adds something worthwhile. A museum visit and a trade show ask for different preparation and different amounts of attention. Keep each event’s venue, admission terms and program alongside its date. A shared calendar entry should tell the next person exactly what is confirmed.
For a work trip, agree on the questions you are bringing before dividing up the schedule. For a day with friends, compare interests early and leave room for separate plans. In either case, allow time to arrive, find the entrance and get oriented without rushing.
Use the High Rise cannabis events calendar to discover other dates, then return to the organizer for final details. California has room for the reading room, the trade floor, the festival and the research session. Pick the experience that gives you something worth carrying home.