Crowds counted down the minutes to midnight then lit up joints as smoking marijuana became legal in Oregon on Wednesday, part of a growing legalization movement spreading down the United States' west coast.
Hundreds gathered on the Burnside Bridge in downtown Portland and smoked under the glow of a neon city sign, marking the moment that the law allowing recreational use, backed by voters in November, came into effect.
The legislation opens the way for shops to sell marijuana by next year - though some lawmakers say they will still try to block retail outlets.
"We are thrilled with the end of adult marijuana prohibition, but we are far from where we need to be," said Russ Belville, from the Portland chapter of pro-marijuana group NORML, on Tuesday before the law came into effect.
Oregon residents aged 21 and older can now smoke privately, grow up to four plants and posses up to eight ounces (227 grams) at home and one ounce outside home, the Liquor Control Commission said.
Driving while high remains illegal and pot cannot be transported out of state, even to neighboring Washington, where retailing started last year, the commission said.
Public smoking also remains illegal, but there were no immediate reports of arrests at the Portland bridge.
