Popular Rochester Lake and Beach FINALLY Open 7 Days A Week Get our free mobile app Good news as we enjoy temperatures climbing back up into the upper upper 80's and low 90's another Rochester, Minnesota, watering hole has opened up for seven day a week use. According to Rochester Parks and Rec, as of today, July 20, 2021, the mining at Cascade Lake is now done. That means the beach and the water are now open seven days a week until Labor Day (Monday, September 6th). Google maps Recreation Supervisor Ben Boldt said “We are excited to be able to have the beach and water open to residents and visitors any day of the week. Cascade Lake continues to be a well trafficked park and we are happy it is being enjoyed.”