The Plunge San Diego is so much more than a public swimming pool. It's a historic landmark, originally built in 1925. Now, The Plunge is located inside of Fit Mission Beach at Belmont Park, an oceanfront family friendly amusement park. Being located in and managed by Fit Mission Beach, San Diego's premier fitness club, The Plunge accommodates swimmers of all ages, and provides private swim lessons, swim lessons for children, water aerobics, and Plunge Masters. All the while, it remains a public pool, allowing swimmers to fully enjoy the warm San Diego weather all year long.