What is a protected slot limit?

It is a size range in which every fish must be released immediately. On Lake Vermilion in 2026, for example, all walleye from 20 to 26 inches go back. You may keep fish shorter than the slot, and most slot rules also allow one fish longer than the slot as part of your limit.

What are the Mille Lacs walleye regulations right now?

For the 2026 open-water season the DNR announced a three-walleye limit, with fish required to be 17 inches or longer and only one over 20 inches, in place through November 30, 2026. Winter rules take effect December 1 and are announced in the fall. Mille Lacs rules can change in season, so check the DNR's Mille Lacs page or the signs at the access.

How do I measure a fish for a Minnesota size limit?

Lay the fish flat on its side with the mouth closed, pinch the tail to its greatest length, and measure from the nose or jaw, whichever sticks out farther, to the farthest tip of the tail. If a fish is close to a slot boundary, treat it as inside the slot and release it.

Can I fillet walleye on a slot limit lake?

Not until you are preparing them to eat. Fish kept from waters with size restrictions that differ from statewide rules must keep head, tail, fins and skin intact so they can be measured. You can clean and eat fish on the ice or at the dock, but you must keep the carcass with head, dorsal fin and tail while you are still on the water.

Why do some Minnesota lakes have a five-sunfish limit?

To protect large bluegills. Big male sunfish guard nests and are easy to catch, and removing them leads to populations of small, early-maturing fish. The DNR has placed reduced daily limits of 5 or 10 sunfish on a long list of lakes with the potential to grow big ones. The statewide possession limit of 20 still applies to your overall total.

Do special regulations apply to ice fishing and spearing too?

Yes. A lake's special regulation applies year-round unless it says otherwise, and on waters with special pike regulations the same rule governs both angling and dark house spearing. Mille Lacs and Upper Red Lake often have different walleye rules in winter than in summer.

Minnesota Slot Limits & Special Regulations Explained (2026)

A special regulation is a lake-specific rule that replaces Minnesota's statewide limit for a species. Most take one of a few forms: a protected slot, a minimum size, a "one over" rule, a reduced bag, or catch-and-release only. They exist because one statewide number cannot fit a walleye lake the size of Mille Lacs and a 200-acre bluegill lake equally well.

The examples here were verified in October 2026 against the 2026 Minnesota fishing regulations booklet, effective through February 28, 2027, and DNR news releases. Lake-specific rules change often. Confirm any lake before keeping fish.

The vocabulary

Term	What it means	2026 example
Protected slot	All fish within a size range must be released immediately	Winnibigoshish: walleye from 18 to 23 inches released
Minimum size	Fish shorter than the stated length must be released	Statewide muskie: 54 inches
One over	One fish above a set length may be part of your limit	Statewide walleye: only one over 20 inches
Harvest slot	Only fish inside a size range may be kept	Big Sandy Lake: walleye under 14 or over 18 inches released, except one over 26
Reduced daily limit	A lower number per day from that lake; statewide possession still caps the total	Whitefish Chain: 5 sunfish, 5 crappie
Reduced possession limit	A lower total you may have from that lake	Leech Lake: 4 walleye
Catch-and-release only	Nothing kept	Inland lake sturgeon

"Immediately released" has a definition: the fish may be kept out only long enough to unhook, measure and photograph. A slot fish in the livewell while you decide is a violation.

Daily limit versus possession limit, again

The booklet is careful about which word each regulation uses. A reduced daily limit (common for sunfish and crappie) means you can take that number per day from the lake, and over several days build up to the statewide possession limit. While you are on that lake, you cannot have more than its daily limit with you. A reduced possession limit (common for walleye) means that number is all you may have from that lake at any time.

Why lakes get their own rules

To protect spawning-age fish

Walleye slots on the big natural lakes are aimed at mature females. Protecting fish from, say, 18 to 26 inches keeps the spawners in the lake while allowing harvest of abundant smaller fish and the occasional trophy.

To fix size structure

In the North-central pike zone, the problem is too many small pike, so the rule encourages keeping fish under 22 inches and protects the 22 to 26 inch fish that can grow into something better. Sunfish rules work the other way, limiting harvest so big bluegills remain.

To stay within a shared harvest quota

Mille Lacs and Upper Red Lake are what the DNR calls intensive management lakes. Their walleye are shared between state-licensed anglers and tribal fisheries, with a safe harvest level agreed each year. The state's regulations are tuned to keep anglers within the state's share, which is why they change by season and sometimes mid-season.

To test an idea

"Experimental" regulations run for a set period and are then evaluated. Some become permanent, some are dropped. The DNR repealed one sunfish regulation and added several others for 2026.

The lakes people ask about

Mille Lacs

Mille Lacs regulations are not printed in the booklet at all; it simply points to the DNR's Mille Lacs Lake page. For open water 2026, the DNR announced in March a limit of three walleye, each 17 inches or longer, with only one over 20 inches, running through November 30. The state's share of the agreed walleye harvest was 105,300 pounds, with 79,700 pounds for tribal fisheries. If angler harvest runs well ahead of projections, the DNR can tighten the rule during the season.

Mille Lacs has also had seasons when walleye were catch-and-release only, which shows how far the regulation can swing with the population estimate. Winter regulations begin December 1 and are announced in the fall. Pike, bass, perch and tullibee on Mille Lacs also have their own rules, and culling is prohibited except for bass. Read the current sheet before every trip.

Upper Red Lake

The state manages the portion of Upper Red Lake outside the Red Lake Reservation; reservation waters are closed to non-band members. Walleye harvest is managed jointly with Red Lake Nation under a harvest plan. For open water 2026 the limit was five walleye with only one over 17 inches, the same as 2025. The winter 2025-26 limit was four with one over 17. As of early October 2026 the DNR had not yet announced the winter 2026-27 rule, which is set after fall netting. The lake's pike rule is fixed: limit three, all from 30 to 40 inches released, one over 40.

Note the logic: the rule steers harvest toward abundant young fish under 17 inches. On Upper Red, the "eater" is the target and the bigger fish is the exception.

Leech Lake

Leech has had a protected walleye slot in past years. The 2026 rule is simpler: possession limit of four walleye, only one over 20 inches, plus daily limits of five crappie and five sunfish.

Rainy Lake and the Voyageurs lakes

Rainy is a border water with a larger combined bag and a slot: eight walleye and sauger combined, no more than four of them walleye, all walleye from 18 to 26 inches released, one over 26. Kabetogama uses the same 18 to 26 inch slot with six combined and no more than four walleye. Namakan, Sand Point and Little Vermilion follow a similar pattern under border rules. See our Voyageurs lakes guide.

Lake of the Woods and the Rainy River

Six walleye and sauger combined, no more than four walleye, all walleye from 19.5 to 28 inches released, one over 28. On the Rainy River and Four Mile Bay, March 1 to April 14 is catch-and-release only for walleye.

Vermilion, Winnibigoshish and others

Vermilion: walleye from 20 to 26 inches released; limit four, one over 26.
Winnibigoshish and connected waters: walleye from 18 to 23 inches released; one over 23.
Sand Lake and connected waters, Itasca County: new for 2026, walleye from 20 to 24 inches released, one over 24.
Gull Lake Chain: pike from 30 to 40 inches released; limit two, one over 40.
Many bass lakes: a 12 to 20 or 14 to 20 inch protected slot with one over 20, or catch-and-release only.

A few lakes go further and restrict methods. Annie Battle Lake in Otter Tail County, inside Glendalough State Park, prohibits motors and electronic fish-finding devices as a deliberately low-tech fishery.

How to look up a lake

LakeFinder. Search the lake on DNR LakeFinder and open its fishing regulations.
The booklet. The special regulations section lists waters alphabetically, with county. Chains are often listed under one name, so "Gull Lake" sends you to "Gull Lake Chain." Watch for same-named lakes in different counties; there are two Blackduck Lakes with different sunfish limits.
The access sign. Special regulations are posted at public accesses, and mid-season changes on intensive management lakes are posted there too.
Border and Lake Superior sections. Lake of the Woods, Rainy, the St. Croix and Lake Superior are in their own parts of the booklet, not the alphabetical list.

Rules that travel with slot fish

Keep them whole. Fish from special-regulation waters must have head, tail, fins and skin intact until you are preparing a meal.
You may not possess a fish that is illegal for the water you are on. There is a narrow exception for fish legally taken from a connected water or packed by a licensed fish packer, when you are heading straight back to your lodging or dock and not fishing on the way.
Carcasses count. If you eat fish on the water, keep the carcass until you are off the lake.
Conservation licenses halve the lake's limit and never allow a walleye over 20 inches.

Handle slot fish for release: wet hands, a rubber net, and a quick measurement on a wet board. The regulation only works if the fish you put back survive.

Bottom line

A slot means release everything inside the range, immediately.
Mille Lacs and Upper Red are set season by season; never rely on last year's numbers, including the ones on this page.
Check LakeFinder at home and the sign at the ramp, and keep fish whole until supper. For the statewide numbers these rules replace, see Minnesota fishing limits.