RiverFire is the Androscoggin Valley Chamber's signature fall festival in Berlin, NH. The annual event features hayrides, train rides, live music, axe throwing, a Halloween costume parade, food vendors, a beer tent, and the spectacular Lighting of the Boompiers — fires that appear to float on the Androscoggin River at dusk. The Zombie ATV Poker Run kicks off the day. Admission $5; children 5 & under free.