Its growing and as popular as ever – We are taking The Green River Festival Exhibit BACK to the Franklin County Fairground for the 2026 Green River Festival – June 19-21, 2026! This year is their 40th celebration, if you are attending this year, please stop by. Rock On! Created in partnership with Signature Sounds Recordings, the exhibit in Memorial Hall Museum’s Music Gallery presents the 40-year history of the Green River Festival, from its humble beginnings as a small country fair to its evolution into New England’s premier music and arts festival.It showcases the growth and impact of the Green River Festival over time through photographs, merchandise, videos, and music.