It wasn’t that long ago that legalizing marijuana for recreational use seemed like a pipe dream. When Gallup first polled people on the question in 1969, only 12 percent supported the idea. Reefer Madness was widespread, and the War on Drugs was about to begin.

Fast forward to today and the support is higher than the citizens of Colorado. The Rocky Mountain State, along with Washington, were the first two states to legalize pot for recreational use. Alaska, Oregon, and our own nation’s capital joined them shortly after.

Ohioans are set to follow in their footsteps and vote on whether to legalize recreational marijuana this November, but the real green wave is set to crash during the 2016 Presidential Election. Here are the 6 states where citizens are poised to end the 78-year prohibition on pot next fall.

California

California might be going through a drought, but they could be opening the green floodgates next fall. The state with the largest population and one of the largest economies would be a monumental turning point in the movement for legal marijuana. Not only would it influence more states to join them, it would put a significant amount of pressure on the federal government to reclassify marijuana (it’s currently classified as being more dangerous than cocaine and meth).

There could be upwards of four groups attempting to get on the ballot. A similar ballot initiative failed in 2010 with only 46.5 percent of citizens supporting it, but opinions seem to have changed. 54 percent of Californians now support legalizing marijuana for recreational use. Legal pot in California could cause a tsunami of support that begins to flood across the entire country.

Nevada

Las Vegas could attract even more tourism come 2017. The Regulate Marijuana Like Alcohol Campaign got more than enough signatures to get a bill on the 2016 ballot. The group needed just 101,667 signatures, and they ended up with more than 200,000.

A 2013 poll had support among Nevadans at 54 percent. National support has risen since then, so it’s likely that it has in Nevada as well. Twenty-first birthday travelers might have even more incentive to come to Sin City when the next President takes office.

Arizona

Arizona is on its way to becoming known for more than just deserts and tough immigration laws. The Campaign to Regulate Marijuana Like Alcohol is hoping to gain 150,642 signatures by July 7, 2016 in order to get marijuana legalization on the ballot. They got 50,000 signatures in the first 10 weeks of petitioning, so it looks like they’re well on their way to reaching their goal.

The Grand Canyon Institute estimated a legal marijuana market in Arizona would generate about $64 million. The majority of that, $54 million, would go towards education. Many people believe that pot makes kids stupid, but in Arizona it might actually help make them smarter!

Maine

A bill that would’ve legalized, taxed, and regulated marijuana was rejected by Maine’s Democratic-controlled House 98-45. That doesn’t mean their citizens don’t want it though. A 2013 poll showed that 49 percent of people in Maine support the idea, with only 39 percent being against it. Citizens in Portland and South Portland have already voted to legalize it, although because it’s still against state law, law enforcement there hasn’t changed.

There are two groups attempting to get on the ballot in 2016, and both will need a little over 61,000 signatures by next January to qualify. The two groups disagree over what state department will deal with legal marijuana, but both have the same ultimate goal. It’s likely that at least one will qualify for the ballot, giving citizens of the Pine Tree State control over whether they want to end marijuana prohibition.

Massachusetts

Maine isn’t the only New England state hoping to bring marijuana out of the black market. 53 percent of their citizens support legalization and only 37 percent are against it. The undecided 10 percent of citizens are a huge x-factor, and you can bet both sides will be spending a fortune in advertising to pull them into their corner.

The Campaign to Regulate Marijuana Like Alcohol will have from later this month until November to gather 64,750 signatures. This would send the initiative to the state legislature to see if they’ll adopt the law. If not, activists will need to get 10,792 more signatures in June 2016 to qualify for the ballot.

Soon enough, Maine and Massachusetts might have more in common than Patriots football.

Missouri

This might come as a surprise to many. The South is well known for having strict marijuana laws, and while Missouri has decriminalized possession under 10 grams, possessing over 35 grams is a felony with a possibility of up to seven years in jail and a $5,000 fine. Isn’t it crazy to think that something you can do legally in one state can land you in jail for a significant amount of time in another?

The Missouri Marijuana Legalization Initiative needs 157,788 signatures by to get on the ballot. So far, the petition has about 40,000 signatures. A 2014 poll of Missourians showed that supporters of legalization were outnumbered by opponents 45-51, and apparently most initiatives fail to even reach the ballot in Missouri.

Missouri is the least likely state on this list to see marijuana legalized, but it could be the most important. Once Southern conservatives join the movement, a tipping point has been reached.