Vermont has open primaries — Vermonters can vote for Bernie Sanders regardless of their registered party.
You must have been registered to vote by Wednesday, February 24th in Vermont.
You can participate in early in-person voting for the Vermont democratic primary at your town clerk's office any time until Monday, February 29. Any voter can also request that their town clerk mail them an early voter absentee ballot any time before the primary. You can find the form to request an absentee ballot here.
You may still vote in Vermont if you will be 18 years old by November 8, 2016.
If you are a college student not living in your home state, you can vote for Bernie in either your home state or in the state in which you are attending school!
If you are a military voter or a United States citizen living abroad, you are able to request a ballot here.