High Time to Celebrate: We Interviewed People Smoking Weed on Hippie Hill on 4/20 – NBC Bay Area

SF to Allow On-Site Cannabis Sales for First Time at Hippie Hill 4

Pot Lovers Flock to San Francisco for Annual 4/20 Smokeout – NBC

At San Francisco's 4/20 marijuana party, public health warnings go

Lavish Parties, Greedy Pols and Panic Rooms: How the 'Apple of Pot

Watch: Hippie Hill Blazes Up in Smoke as Nearly 20,000 Stoners

4/20 Festival in San Francisco Returns – NBC Bay Area

Press Release: Annual 420 Event Returns to Hippie Hill – Richmond

Watch: Hippie Hill Blazes Up in Smoke as Nearly 20,000 Stoners

4/20 at Hippie Hill will be 21+ and checking ID, plus requiring proof

Up In Smoke; Thousands Gather At Hippie Hill For 4/20 Celebration

S.F.'s 4/20 event brings huge crowds — and for neighbors, headaches

420 Hippie hill SF

Pot Lovers Flock to San Francisco for Annual 4/20 Smokeout – NBC

4/20 Parties in San Francisco and Oakland - 7x7 Bay Area

420 celebration at Hippie Hill