- Start: Apr 20 2019 09:00
- Finish: Apr 20 2019 20:00
- Time zone: America/Los_Angeles
greenRush.com presents 4/20 at Hippie Hill 2018 is the world’s oldest and largest 4/20 celebration, held every year on April 20th at Hippie Hill in San Francisco’s Golden Gate Park. For more than 50 years, Hippie Hill has served as the iconic cultural landmark and gathering point for annual 4/20 celebrations, with nearly thousands of revelers attending 4/20 at Hippie Hill in 2018.