The 2018 Lake Ice In map shows ice in dates received by the DNR and the Minnesota Pollution Control Agency.
The DNR does not measure ice thickness on Minnesota lakes. Your safety is your responsibility. Check ice thickness at least every 150 feet.
Ice is Never 100% Safe!
Ice in dates should not be used to track ice thickness for recreational use. Ice conditions can change rapidly and should be checked frequently. Review ice safety tips.
Lake Ice In Map
Definition of Lake Ice In
The definition of lake ice in can vary from lake to lake. For the citizen observers reporting data, ice in occurs when the entire lake is frozen over for the first time and the ice cover remains through winter. Observers do not report ice thickness.
Frequency of Updates
The map is not updated in real time. Updates to the lake ice in map are made as information is available.
Become a Citizen Observer
Post the date, lake name and county to the Minnesota DNR Climate Office Facebook page.