Michigan Fly Fishing Hub · Regulations Guide
Michigan Trout Stream
Regulations Explained
Michigan classifies every trout stream into one of four types — each with different season dates, bag limits, size limits, and gear restrictions. Here is what each type actually means, which rivers fall into which category, and how to fish legally on every water in the state.
Type 1
General Trout Stream
Type 2
Quality Trout — Gear Restricted
Type 3
Quality Fishing — Reduced Limits
Type 4
Catch-and-Release / Flies Only
Why This Matters
The System That Confuses Every Michigan Angler
Michigan has 36,000 miles of rivers and streams — and the trout regulations vary dramatically from one water body to the next. The same species caught on the same day in two different sections of the same river can be subject to completely different rules depending on which stretch you're standing in.
The DNR uses a four-tier classification system for inland trout and salmon streams, scaled from most permissive (Type 1) to most restrictive (Type 4). Understanding this system is not optional — it is the difference between a legal day of fishing and a conservation officer writing you a citation on the bank of the Au Sable during Hex season.
The 2026 Michigan Fishing Regulations are in effect through March 31, 2027. All stream type information below is based on current DNR regulations.
The Four Types
Type 1 Through Type 4 — Explained
Type 1
General Trout Stream
Standard regulations. Most permissive of the four types.
SeasonLast Saturday in April – September 30
GearAny legal fishing tackle including bait
Brown Trout8" minimum · 5 fish daily limit
Rainbow Trout10" minimum · 5 fish daily limit
Brook Trout8" minimum · 5 fish daily limit
Examples: most smaller Michigan streams, many UP rivers. The most common classification — if a river isn't listed as Type 2, 3, or 4, it's typically managed under Type 1 or general unclassified rules.
Type 2
Quality Trout — Gear Restricted
Artificial lures only. Catch-and-release only for trout. Extended or year-round season.
SeasonOpen all year on most Type 2 waters
GearArtificial lures only — no bait of any kind
Trout PossessionCatch-and-release only — no trout may be kept
Other SpeciesVaries — some Type 2 sections allow possession of non-trout species
Examples: Sections of the Au Sable North Branch (Sheep Ranch to confluence), portions of the Jordan River. Year-round access and artificial lures only. This type protects high-quality fisheries from pressure while keeping them accessible.
Type 3
Quality Fishing — Reduced Limits
Standard gear allowed but reduced bag limits and larger size requirements protect trophy-class fish.
SeasonVaries by specific section — often year-round or extended
GearArtificial lures and fly fishing tackle
Brown TroutReduced possession limit — often 1 fish per day with larger size minimum
SteelheadOn many Type 3 sections: 1 fish per day, previously 20" minimum (some sections modified for 2026 — verify)
SalmonReduced limits compared to general regulations
Examples: Sections of the Muskegon River (15" size limit for browns), Pere Marquette, and other premier trophy fisheries where the DNR manages for large fish over high harvest. Fewer than 200 streams statewide are classified Type 3 or 4.
Type 4
Catch-and-Release / Flies Only
The most restrictive classification. Michigan's premier fisheries. Flies only, catch-and-release for all trout, typically year-round.
SeasonOpen all year on most Type 4 waters
GearArtificial flies only — a fly rod with a fly line and an artificial fly. No spinning gear, no bait, no hardware.
TroutCatch-and-release only for all trout, all sizes
Other SpeciesVaries — check the specific water
Examples: Au Sable Holy Water (Burton's to Wakeley Bridge), Au Sable South Branch Mason Tract (Chase Bridge to Lower High Banks), portions of the Two-Hearted River. These are Michigan's most famous and most protected waters.
Side-by-Side Comparison
At-a-Glance Comparison — All Four Types
| Regulation |
Type 1 |
Type 2 |
Type 3 |
Type 4 |
| Standard Season |
Late Apr – Sep 30 |
Year-round |
Varies / extended |
Year-round |
| Bait allowed? |
Yes |
No |
No |
No |
| Spinning gear? |
Yes |
No |
Varies |
No |
| Fly fishing? |
Yes |
Yes |
Yes |
Yes (only option) |
| Keep trout? |
Yes (limits apply) |
No — C&R only |
Limited — 1 fish often |
No — C&R only |
| Brown Trout minimum |
8 inches |
N/A (C&R) |
Larger — varies |
N/A (C&R) |
| Daily bag limit |
5 fish |
0 (C&R) |
1 or 2 typically |
0 (C&R) |
| Famous examples |
Most small streams, many UP rivers |
Au Sable North Branch, Jordan sections |
Muskegon (15" limit), Pere Marquette |
Au Sable Holy Water, Mason Tract, Two-Hearted |
The most important thing to understand
Type 3 and Type 4 waters are where most violations occur. Anglers fishing famous rivers like the Muskegon, Pere Marquette, and Au Sable often assume the regulations are the same as their local river. They are not. If you are fishing a river on this site's covered list, verify its specific type before keeping any fish or using spinning gear.
Additional Designations
Beyond the Four Types — Other Special Designations
The four Type classifications are the primary system, but several additional designations add further restrictions on specific waters.
Gear Restricted (GR)
Artificial lures only on designated sections, but trout harvest may still be allowed. Varies by specific water. All GR streams are Designated Trout Streams.
Brook Trout Restoration Area (BTRA)
Designated sections managed specifically for brook trout recovery. Typically artificial flies or lures only, catch-and-release for brook trout specifically. Check the regulations booklet.
Research Area (RA)
Sections managed under DNR research protocols. Rules vary significantly — some are more permissive, some more restrictive. Always verify before fishing.
Designated Trout Stream
All Type 1, 2, GR, BTRA, and most Type 3 and 4 streams. Designated streams are protected from certain shoreline activities beyond just fishing regulation. Look for posted signs.
Catch-and-Release Only
Some waters are specifically designated C&R regardless of their Type designation. The Au Sable Holy Water is the most famous example. Always check the specific section.
No Closed Season
All Type 2, 3, and 4 streams as well as some unclassified streams are open to fishing year-round. The standard late April opener does not apply to these waters.
How to Find Any Stream's Type
Looking Up Your River Before You Go
Three resources — use all three together for any unfamiliar water:
1. DNR Inland Trout and Salmon Interactive Map — The most authoritative source. Search any Michigan stream and see its classification type, season dates, and bag limits. michigan.gov/dnr → Fishing Regulations
2. Michigan Fishing Regulations Booklet (PDF) — Available free at any DNR office or sporting goods store. The booklet lists every classified stream by county with its type, season, and limits. Download the current version at michigan.gov/dnr. The 2026 regulations are in effect through March 31, 2027.
3. eRegulations Michigan — A searchable online version of the regulations at eregulations.com/michigan/fishing
Practical tip
When in doubt about any section's regulations, call the local DNR office or a fly shop near the river. Gates Au Sable Lodge, Old Au Sable Fly Shop, Nomad Anglers, and Batcke's Fly Shop are all authoritative sources on their home waters and they answer regulation questions from visiting anglers every day. Five minutes on the phone is worth far more than a citation.
FAQ
Frequently Asked Questions
Can I use spinning gear on a Type 4 stream if I'm using an artificial lure instead of bait?+
No. Type 4 waters require artificial flies — meaning fly fishing tackle with a fly rod and fly line, and an artificial fly pattern. Spinning gear is not permitted regardless of lure type. This is one of the most common misconceptions. On the Au Sable Holy Water, the only legal setup is a fly rod.
Does the Type classification change in different sections of the same river?+
Yes — and this is the most important thing to understand. A river can have multiple type designations along its length. The Au Sable main branch, for example, has Type 4 regulations from Burton's Landing to Wakeley Bridge (the Holy Water), different regulations from Wakeley to McMaster's Bridge, and general regulations on other sections. Always check the specific mileage or landmark boundaries in the regulations booklet for the section you plan to fish.
If I'm on a Type 1 stream that borders a Type 4 stretch, which rules apply where I'm standing?+
The rules that apply are those of the water where your line is in. If your fly is drifting through Type 4 water, Type 4 regulations apply — even if you are standing on the bank of a Type 1 section. The boundary is defined by the water, not by where the angler is standing.
Can I fish a Type 2 or Type 4 stream during the winter (outside of standard trout season)?+
Yes — Type 2 and Type 4 streams are open year-round, which is one of their primary advantages for anglers. You can fish the Au Sable Holy Water in January with a fly rod. Standard season dates (last Saturday in April through September 30) apply only to Type 1 waters and some unclassified streams. Always carry your license — it is required year-round on all waters.
What is the penalty for violating stream type regulations in Michigan?+
Fishing regulation violations in Michigan are typically civil infractions with fines ranging from $100 to $500+ depending on the violation. Using prohibited tackle (spinning gear on a fly-only stretch) or keeping fish on a C&R water are both serious violations. Conservation Officers actively patrol blue-ribbon streams, particularly during peak season. License revocation is possible for repeat offenders.
Are the Muskegon River and Pere Marquette Type 3 or Type 4?+
Both rivers have sections under Type 3 regulations — reduced bag limits and size minimums rather than full catch-and-release. The Muskegon's famous 15-inch size limit on brown trout throughout much of the lower river is a Type 3 designation. The Pere Marquette has Type 3 sections in key steelhead and trout stretches. Neither the full Muskegon nor the full Pere Marquette is Type 4 — but specific sections of each may have additional restrictions. Verify the specific section you plan to fish.