The best months to hike in South Dakota are between April and September, weather-wise. However, to avoid possible crowds at the swimming hole, you may want to hold off going until late August when ...

YANKTON S.D. (KELO)– South Dakota Game Fish and Parks announced ... The GFP closed the Lake Alvin swimming beach on June 20 because of unhealthy levels of bacteria in the water.

I found a South Dakota Swimming document online where Andrew held a state record ... state success and even the work needed ...