From the Iowa Department of Natural Resources
Ice fishing shelters, left unattended, must be removed from state-owned lands and waters, including parking lots and boat ramps, by Feb. 20.
Ice fishing shelter owners who camp in a paid campsite within a state park can remain past the Feb. 20 deadline.
Ice fishing shelter owners are encouraged not to wait until the last minute to get their shelter off the ice. If a shelter falls through the ice, the owner is responsible for getting it out of the lake.