Swimming. Swimming is permitted at Hopatcong State Park during the summer while lifeguards are on duty . There is a bathhouse complex containing restrooms, showers, changing areas, a first-aid room and concession where food and beach supplies are available for purchase. Is Lake Hopatcong man made? Is Lake Hopatcong dirty? What type of lake is Lake Hopatcong? Is Lake Hopatcong safe to swim in? Is Lake Hopatcong open to public? Can you swim in Lake Hopatcong now? Can you eat fish from Lake Hopatcong? Are there snakes in Lake Hopatcong? Is it safe to swim in Lake Hopatcong? What animals are in Lake Hopatcong? Is Lake Hopatcong still polluted? What is wrong with Lake Hopatcong? Does Lake Hopatcong have algae bloom? Is Lake Hopatcong nice? Can you swim in Crater Lake right now? What time do the fireworks start in Lake Hopatcong? Where can I watch fireworks at Lake Hopatcong? Is Lake Hopatcong Open 2021? Can you swim Lake Wivenhoe? ...