Can I bring marijuana across state lines?

No. Federal law prohibits bringing a federally-restricted substance, like marijuana, across state lines, even if both states legalize marijuana.

We advise against attempting to bring marijuana across state lines, in any form or any amount.

In addition to federal law prohibiting bringing marijuana across state lines, several weed-legal states have penalties for transport across state lines. That being said, while illegal, it is unlikely that the DEA or other federal agents will be heavily patrolling a state border searching for small amounts of marijuana. Before traveling, you'll want to weigh the benefits and consequences, and travel at their own risk.