Ice fishing laws in Idaho are looser than open-water rules in some ways and stricter in others. You can fish with up to five lines instead of one, but you can only cut a hole 10 inches wide, and your shanty needs your name on it if it stays overnight.
This article walks you through the rules most likely to catch anglers off guard, from licensing and gear limits to bait bans and vehicle safety. The Idaho Department of Fish and Game (IDFG) notes that ice fishing rules differ from general fishing for public safety and to reduce crowding.
Special rules apply to certain lakes and reservoirs, so treat this as a framework and confirm the details for your specific water before you drill.
Important Note: Idaho fishing rules are set by the Fish and Game Commission and can change between seasons. This article is educational, not legal advice. Check the current IDFG regulation booklet or call your regional office before you head out.
Do You Need a Fishing License to Ice Fish in Idaho
Yes. Ice fishing is fishing, and the same license rules apply. A Spokesman-Review report on Idaho’s ice rules notes that anglers age 14 and older need a license, and it must be on your person while you fish.
Idaho licenses run on a calendar year, so a license bought for last season will not cover a January trip. An IDFG regional biologist put it plainly in an IDFG ice fishing safety column: after safety, the second most important thing to remember is that a new license is required January 1st.
Anglers on Priest Lake should also know that, per a Priest Lake season guide, a Habitat Stamp is listed alongside the license. For full license types, fees, and exemptions, see our breakdown of fishing license requirements in Idaho.
- Age 14 and older: license required
- Carry it on you, not in the truck
- Buy a new license each January
Ice Fishing Seasons and Open Waters in Idaho
Idaho does not have a single statewide “ice season.” Ice fishing simply follows the open-water season of whatever lake you are on. In many regions, the Idaho seasons and limits listing shows all waters open all year, except for special rule waters.
Those exceptions matter. A popular example is Henrys Lake, where one Idaho ice fishing guide reports fishing closes January 2. That source is several years old, so verify the closure date in the current regulation booklet before planning a trip there.
Most waters in the Idaho Panhandle are open to ice fishing, according to IDFG, but you should still read the special rules for your lake. Some waters limit lines, ban bait, or close for spawning protection.
Pro Tip: Ice conditions vary by region and by week. Call your local Fish and Game regional office before a long drive, as IDFG itself recommends.
Line, Tip-Up and Hook Limits for Ice Fishing in Idaho
This is where ice fishing gets more generous. Under Idaho Administrative Code 13.01.11.200, it is unlawful to use more than five lines while ice fishing or to put more than five hooks on a line. Unattended lines are also unlawful.
That matters for tip-ups. A tip-up is a device that holds bait at a set depth and signals a strike with a flag, so you can manage several holes at once. In Idaho, every tip-up counts as one of your five lines, and you need to stay close enough to attend it.
| Gear Rule | Idaho Limit |
|---|---|
| Lines or poles per angler | 5 |
| Hooks per line | 5 |
| Unattended lines | Not allowed |
| Two-pole permit | Does not raise the five-line cap |
| Treble hook | Counts as one hook |
A treble hook is considered a single hook, per the statewide general rules, though exceptions may apply on special rule waters. Some waters cut the limit hard. In the Southeast Region, the seasons listing shows one line only when ice fishing on certain reservoirs, with two lines allowed for two-pole permit holders.
Ice Fishing Hole Size Rules in Idaho
Fishing is allowed only through a hole up to 10 inches in diameter. IDFG explains the reasoning: smaller holes reduce the risk of someone falling through. There is no limit on how many holes you can drill.
The one exception is Bear Lake in southeast Idaho, where anglers can dip-net cisco through any size hole. Per the seasons listing, the cisco dip-net season runs January 1 through February 15, with a 30-fish limit and nets no larger than 18 inches in any dimension.
The penalty is real. Idaho Code lists using or cutting a hole larger than ten inches for ice fishing as an infraction under Idaho Code 36-1401.
Pro Tip: An IDFG press piece says most targets need a hole from 5 to 10 inches. Check the diameter of your auger blade before you buy; a 10-inch auger is the legal maximum, not a safe default for small fish.
Ice Shelter and Shanty Rules in Idaho
You can use a shelter, shanty, or ice house on Idaho waters. The rule is about identification. If you leave an enclosure unattended overnight, the owner’s name, telephone number, and current address must be legibly marked on two opposing sides, per IDFG.
The administrative code also allows a sportsman identification number in place of an address. Marking two opposite walls means a wildlife officer can read the information from either direction.
IDFG adds that shelters must be removed from the ice before the spring thaw. Abandoned shanties that fall through the ice become a hazard and a pollution problem, so plan your pull-off date around the weather, not the calendar.
- Write your name, phone number, and address (or sportsman ID) on two opposing walls.
- Use weatherproof paint or a durable marker.
- Remove the shelter well before ice softens in spring.
Bag, Size and Species Limits for Ice Fishing in Idaho
Your daily limits are the same as during open water unless the lake has special rules. IDFG lists a statewide daily trout limit of six fish, with no limit on perch, bluegill, or crappie. Special rule waters can be tighter.
The Southeast Region listing shows how much limits can shift by water. On Bear Lake, the trout limit is 2, the whitefish limit is 10, and the bass limit is 2 with none under 20 inches. Daniels Reservoir has a 2-trout limit with none under 20 inches.
Gaff hooks are another species-related rule. You can use one only to land fish through a hole in the ice, and only in waters with no length restrictions or harvest closures for that species. If you plan to release a fish, do not gaff it.
| Species or Water | Limit (Per IDFG or Seasons Listing) |
|---|---|
| Trout, statewide | 6 per day |
| Perch, bluegill, crappie | No limit statewide |
| Bear Lake cisco | 30 |
| Bear Lake whitefish | 10 |
| Bear Lake bass | 2, none under 20 inches |
Exceeding a bag limit by one fish is an infraction under Idaho Code 36-1401, with exceptions for sturgeon and anadromous salmon and steelhead.
Vehicle, ATV and Snowmobile Rules on the Ice in Idaho
The research I found does not point to a statute that bans or permits ATVs and snowmobiles on frozen lakes across the board, so the practical limit is ice strength. Land managers and local rules can still restrict motorized use on specific waters, so check before you ride.
IDFG’s safety guidance is specific about thickness. Three to four inches of solid ice is the minimum to support a person, and 10 inches is needed for an ATV or snow machine. Thicker ice is needed for groups.
Cars and trucks are a different story. IDFG states that ice does not typically get thick enough to drive cars and trucks on Idaho’s lakes and reservoirs.
| Load | Minimum Solid Ice (IDFG) |
|---|---|
| One person on foot | 3 to 4 inches |
| ATV or snow machine | 10 inches |
| Car or truck | Not typically safe on Idaho waters |
Common Mistake: Trusting ice thickness near the shore across the whole lake. IDFG warns that thickness is not uniform and that inlets, outlets, springs, and spots near docks can weaken ice. Drill test holes as you go.
A hunter-safety angle applies too. If you share the ice with other users, remember that unrelated rules, such as those in our guides to spearfishing laws in Idaho, do not allow spearing or bowfishing through the ice during a normal fishing trip. Idaho code lists archery and spearfishing as unlawful fishing methods unless a rule says otherwise.
Live Bait Rules for Ice Fishing in Idaho
Idaho bans several bait types under the general fishing rules. It is unlawful to use live fish, leeches, frogs, salamanders, waterdogs, or shrimp as bait, according to the Idaho Administrative Code. That limit applies on the ice, too.
That affects tip-up anglers most. A popular tactic in other states is a live minnow under a tip-up, but in Idaho you should use dead or cut bait, worms, maggots, or artificial lures instead. A Priest Lake guide suggests whole cisco, whitefish, or sucker sections for lake trout, which fits within those limits if the bait is dead.
Some waters are even stricter. At Daniels Reservoir, the seasons listing says no bait is allowed and barbless hooks are required. IDFG also warns that some waters limit poles or bait while ice fishing.
Before you leave, read your lake’s entry in the regulation booklet, check your license date, and test the ice. For related state rules, see our guides on pet import laws in Idaho if you are traveling with a dog, and leash laws in Idaho for keeping that dog under control near other anglers.