Riverfest is an annual event that is held the first Saturday in June every year. PLEASECHECKTHEWEBSITEFORALLTHEDETAILS. There is live music, great food, great shopping with many vendors and plenty of entertainment for your children. In addition there are kayak rides and Hudson RIver sloop boat rides as well. Its a day of fun in COH for the whole family in the most beautiful setting ever, on the shores of the Hudson River.