Vermont is a state in the New England region of the northeastern United States. In 2009 the Vermont became the first state to legislate same-sex marriage.
In "Fresh Heir", Peter asks Chris to marry him so that he can still have access to the Pewterschmidt family fortune after Carter makes him his sole heir. They head to Vermont for the ceremony where Chris gets annoyed with him checking out another boy's butt while registering gifts at Kitchenware Unlimited. At Trattoria, Peter makes the arrangements for the morning-after reception. And at Johnny's Dance Studio, Chris and Peter practice their dance for the wedding.
In "Dog Bites Bear", Brian and Stewie head off to Vermont to scatter Rupert's ashes from the summit of Mount Mansfield at Smugglers' Notch State Park.
In "Shanksgiving", Joe suggests going to Vermont to prevent celebrating Thanksgiving.
In "Cootie & the Blowhard", Stewie travels to Vermont for physician-assisted suicide after coming down with cooties. Brian gives chase, meeting Bernie Sanders along the way, before confronting his best friend at the hospital and convincing him to live life to the fullest in the time he has left.
In "The Stewaway", Peter and Lois win a romantic weekend trip to Vermont, where Lois intends to shatter Bonnie's Instagram like record with some scenic pictures. However, she ends up breaking a leg after a failed cliffside shoot. Deciding that no record is worth injuring herself, Lois decides to give up on her goal, only to renege upon discovering that her hospice photo broke the like record.