Ice Fishing Season Dates and Shelter Deadlines

No. A regulation is a date or a rule a state agency published: when a shelter has to be off the ice, when a season opens and closes, what a licence costs, how many lines and how wide a hole. None of that describes the ice. Ice thickness varies across a single lake on a single day, it changes with current, springs, snow cover and a warm afternoon, and the agencies best placed to publish a thickness decline to. For anything about whether ice will hold, contact your state agency and look at the water yourself.

It depends on the state and often on which part of the state, and the range is wider than most people expect. Across the 11 states here with a dated deadline, the earliest falls on Feb 20 and the latest on Apr 1, which is more than five weeks apart. Several states split the date along a line: Minnesota draws one across the middle of the state along US Highway 10 and Highway 2, Wisconsin uses Highway 64, and Michigan lists thirty two counties by name. Border waters usually have their own date, agreed with the neighbouring state, and it is often earlier than the inland one.

Not everywhere, and telling the two apart matters. Some states write a fixed calendar date into a fisheries order or an administrative rule, and Michigan’s order says "of any year" in as many words, so that date recurs until the order changes. Others publish a date each season and it moves: Wisconsin describes its inland date as the first Sunday following March 1. A third group states a rule rather than a date, such as Vermont’s last Sunday in March or Michigan’s first Sunday after February 20, and the calendar date has to be worked out from the rule every winter. This site labels which of the three each deadline is, and it never carries a date the agency published for one season into a season the agency has not published yet.

The deadlines carry teeth, which is why they are the most searched thing in this vertical every February. Minnesota states that owners may be cited and that a conservation officer may confiscate, remove or destroy a structure and its contents. Michigan’s order provides that for Lake St Clair the department or the local unit of government may authorise removal, storage or destruction. Wisconsin asks the public to report shanties left behind to its violation hotline. The exact consequence is the agency’s to state, and each state page links the page that states it.

More than in open water almost everywhere, and the spread between states is enormous. Of the 25 states here, 9 publish a line or device limit that this site could read from a raw agency source. Vermont allows eight on most waters and up to fifteen on Lake Champlain. Connecticut allows six devices. Idaho allows five poles with five hooks on each. Illinois allows three poles or tip ups with two hooks each. Minnesota allows two lines through the ice against one in open water. Utah allows two as a default and six at four named reservoirs. Read your own state’s page and then the agency page it links, because several of these change again on a named water.

Yes in several states, and it is one of the rules people are most often surprised by. 6 of the states here publish one. Illinois and Utah cap a hole at twelve inches, Idaho and Nebraska at ten. Ohio caps it at ten inches at Pymatuning Lake specifically. North Dakota does not cap the size but requires a hole larger than ten inches to be marked when it is left behind, with a natural object or a brightly painted lath visible from at least 150 feet. Utah is the most precise: twelve inches at the widest point, with named exceptions where a different limit or no limit applies.

In most states no, and in two states yes. Minnesota licenses every non-portable shelter, which includes any wheeled fish house, at 15 dollars for a resident and 37 for a non-resident, and a portable needs one only when it is left unattended with every occupant more than 200 feet away. Nebraska charges 5 dollars for a permanent shelter on a state recreation area or wildlife management area lake. Everywhere else in this set that publishes an answer, the shelter itself is free and the ordinary fishing licence is all that is required. What almost every state does require is identification on the outside of the shelter, and the specifics differ down to the letter height.

25. 17 of them carry at least one rule read directly from a state agency source, and 10 carry both a sourced deadline and a sourced season structure. The remaining 8 name the agency and link its regulations, which is where those states publish the season and shelter rules: a regulations PDF, a document viewer or an interactive lookup, depending on the state. Every rule anywhere in this set carries the agency page it came from and the day that page was read.

Three of them come from machine-readable regulation feeds the states themselves publish, which is unusual and is the technical spine of this vertical. Minnesota DNR backs its lake finder with a structured regulation file carrying an explicit start and end date for every species. Wisconsin DNR publishes 7,018 lake polygons whose species columns begin with the season dates for that lake. Michigan DNR publishes its designated trout lakes with season start and end fields. Everything else, including every single shelter removal deadline, was found by hand on an agency page: a search of the national open data catalogue for ice shanty datasets returns nothing at all, in any state. That is why each of those dates carries the exact page it came from and the day it was read.

Not by themselves. Nearly every date in this vertical is published per season, which means it expires. This page set covers the 2026-27 season year with data as of September 4, 2026, states that on every page, and shows the season a date belongs to next to the date. Where a state had published only the previous season’s dates when this was built, the previous season’s dates are labelled as such and nothing is carried forward. The agency page linked beside each rule is the final word on the morning you go.