It is looking increasingly likely that this year the voters of Washington State will legalize marijuana. Initiative 502, which would legalize, regulate and tax marijuana, is currently on the November ballot, and a new poll shows it holds a huge lead.

According to a SurveyUSA poll for King 5, the initiative is currently supported by 57* percent of likely voters in the state. The poll found only 34 percent say they oppose the measure while another 9 percent are currently undecided.

Even if all the undecided end up breaking against the initiative, which tends to happen with ballot measures, I-502 should still easily be able to win approval. If the campaign can simply maintain most of its current level of support it would likely get over 50 percent on election day. That should be an achievable goal given that there is currently very little organized opposition to I-502 in the state.

Beside the fact that the I-502 is polling over 50 percent and holds a huge lead, the other good news from this poll is that support for legalization appears to be growing as we get closer to November. Two months ago the same pollsters previously asked about I-502  and found it had a smaller lead with 55 percent in support to 32 percent opposed. This far out from the election having a positive trend line in the polling is sometimes a more reassuring development for a campaign than having a solid lead at the moment.

It would currently appear that Washington is the state most likely to legalize marijuana this November, but it might not be the only one. Marijuana legalization initiatives also qualified for the ballots in Oregon and Colorado this year. While the polling for the Colorado initiative is not as good, recent polling did find it has a nine point lead. It stands a decent chance of narrowly winning approval.

*Updated: the poll result provided by King 5′s website did not match the numbers provided by the pollster. Post was updated with the results directly the pollster’s website.