East and West Okoboji and Big Spirit Lakes near Okoboji, Iowa
"Ice out! Wow, by March 17, East Okoboji, Big Spirit and West Okoboji were clear of ice! Now that's pretty darned early. " "According to data on the Iowa Great Lakes Water Safety Council, here are the normal, earliest and latest ice-outs. The normal date is March 31 for East Okoboji, April 4 for Big Spirit and April 7 for West Lake. The earliest ice has ever gone out is March 3 for East Lake, March 6 for Big Spirit and March 7 for West Okoboji, while the latest dates are April 26 for East Okoboji and April 28 for both Big Spirit and West Okoboji. "
