420 & Hippie Hill in San Francisco

Last verified: March 2026

The World's Cannabis Holiday, Born in San Francisco

April 20 — 4/20 — is the world's cannabis holiday, and there is no place on earth more associated with it than Hippie Hill in San Francisco's Golden Gate Park. Officially known as Robin Williams Meadow, this sloping hillside has been the gathering point for San Francisco's cannabis community for decades, drawing 15,000 to 20,000 people at its peak for a single afternoon of communal celebration.

The ritual is straightforward: people gather throughout the day, the crowd builds, and at precisely 4:20 PM, a massive ceremonial moment unfolds as thousands light up simultaneously. It is part protest, part celebration, part pilgrimage — and it is uniquely San Francisco.

A History of 420 at Hippie Hill

The Hippie Hill 420 event grew organically from San Francisco's counterculture roots. What started as an informal gathering became one of the largest cannabis events in the world. At its peak, the event featured:

• 15,000–20,000 attendees in a single afternoon
• Live performances — Erykah Badu, Too Short, Berner, and other artists have performed
• Vendors and food throughout the meadow
• The 4:20 PM moment — a synchronized ceremonial consumption that creates a visible cloud over the hillside

The event was never quite "official" in the traditional sense. It existed in a gray area — too large and too embedded in the city's identity for authorities to shut down, but never fully sanctioned either. That ambiguity was part of its character.

2024–2025: Cancellations and the Uncertain Future

The organized 420 Hippie Hill event was canceled in both 2024 and 2025. The reasons were pragmatic: the event could not secure sponsors or sufficient budget to cover the costs of staging, security, permits, and cleanup that a gathering of this size requires. City budget cuts compounded the problem.

But canceling the organized event did not cancel the tradition. Informal attendance persists. Thousands still show up at Robin Williams Meadow every April 20, with or without a stage, sponsors, or official programming. The gathering predates the organized event, and it will likely outlast it. You cannot cancel a pilgrimage.

SF Weed Week & SF Space Walk

Dates: April 13–20 (leading into 4/20)

Organizer: David Downs (cannabis journalist)

While the traditional Hippie Hill event faces uncertainty, a new event has emerged to fill the gap. SF Space Walk, organized by cannabis journalist David Downs, is a week-long cannabis crawl structured around a simple, elegant concept:

Seven growers. Seven strains. Seven lounges. Seven nights. Each evening highlights a different grower, a different strain, and a different lounge — creating a guided tour through the best of San Francisco's cannabis scene during the week leading up to 4/20. It is intimate where Hippie Hill was massive, curated where the hill was chaotic, and lounge-based where the hill was outdoor.

SF Space Walk represents the evolution of 4/20 culture in San Francisco: from an informal outdoor gathering to a sophisticated, lounge-driven experience that takes advantage of the city's unique infrastructure of licensed consumption spaces.

Outside Lands & Grass Lands

When: August 7–9, 2026 | Where: Golden Gate Park

If 4/20 is San Francisco's cannabis holiday, Grass Lands at Outside Lands is its cannabis festival. Launched in 2018, Grass Lands was the first legal cannabis sales area at a major U.S. music festival — a moment that made national headlines and signaled the mainstreaming of cannabis culture.

Grass Lands features 20+ purveyors and 35+ brands, a Legacy Market honoring pre-legalization cultivators, comedy and DJ performances, cannabis cooking demonstrations, and educational sessions. The festival draws approximately 200,000 total attendees over three days, and Grass Lands is a core part of the experience — not a sideshow.

For cannabis tourists, Outside Lands offers something no other festival can: legal cannabis consumption in Golden Gate Park, surrounded by world-class music, in the city that made legalization possible. See our Cannabis Tourism page for more details.

The 4/20 Calendar

Visiting Hippie Hill

Robin Williams Meadow is located in the eastern end of Golden Gate Park, near the intersection of John F. Kennedy Drive and Kezar Drive. It is accessible via Muni (N-Judah to Cole/Carl, then walk, or 33 bus to Stanyan/Waller).

The meadow is beautiful year-round and worth visiting even when it is not 4/20. On a sunny afternoon, you will often find people relaxing on the hillside with the same casual, community-minded energy that has defined this spot for decades.

Related on this site: Cannabis Dos and Don'ts for SF Visitors, SF Cannabis Visitor Guide, Send a Message.