Buttermilk Jamboree cancels music fest for second year in a row due to COVID John Sinkevics For the second year in a row, Circle Pines Center south of Grand Rapids has canceled Buttermilk Jamboree due to the COVID pandemic. Organizers of the June music festival – which combines national touring acts with a robust lineup of Michigan artists and family programming at a picturesque site in Barry Township’s community of Delton – had high hopes for a 2021 return of the three-day event until conditions deteriorated. “We met in March and things seemed so good, so we were going to have a small Buttermilk, but things have really taken a shockingly bad turn for the worse,” said Sasha Ospina, center director, referring to Michigan’s upswing in COVID cases.