Chris Izworski’s Michigan Trout Daily weekly overview for Sunday, May 17: here is what the gauges actually show across the state right now. This is a good week to be a Michigan trout angler. Most of the state is running near normal or slightly elevated, caddis and early sulphurs are building toward the peak of May, and water temperatures across both peninsulas remain comfortably cool. The challenge this week is not too much water or too little, but rather choosing between dozens of viable options, each with its own character and current conditions.
Upper Peninsula: Cold Water and Variable Flows
The Upper Peninsula is telling two different stories. The western UP rivers, particularly the Tahquamenon River at 147% of median and the Cisco Branch Ontonagon River at 135%, are running noticeably high and deserve respect with appropriate tactics and caution. The Salmon Trout River is also solid at 127% of median. These rivers are pushing more current than normal, which will concentrate trout in softer water and behind structure; they are worth fishing, but plan on drifts and nymphs over long dry fly runs.
The central and eastern UP tells a different story. The Black River in Schoolcraft County sits at a manageable 96% of median, the Brule River on the Wisconsin border is right at 100%, and the Sturgeon River near Nahma is at 110% of median. These are solid platforms for the week. However, the lower-end rivers show real constraint. The Black River in the UP proper is at only 43% of median, the Sturgeon River in the UP is at 48%, the Silver River is at 48%, and the Michigamme River is at 49%. These low flows make for excellent dry fly conditions if you have access, but trout will be concentrated and selective. Water temperatures across the UP range from a cold 46 degrees on the East Branch Salmon Trout River to 55 degrees on the Escanaba River, which means bug activity is building but not yet explosive.
Northern Lower Peninsula: The Heart of May Fishing
The Northern Lower Peninsula is where most Michigan trout anglers will find the most balanced conditions this week. The AuSable River is running at 115% of median, near normal and perfect for this time of year. The Manistee River sits at a solid 122% of median with water temperatures at 54 degrees, the coldest reporting in the NLP, which favors sustained bug activity. The Pere Marquette River is at 104% of median, exactly where you want it in mid-May. The Jordan River is at 117% of median, and the Pigeon River is at 122%. These are not blown-out conditions; they are workable, productive conditions during caddis and early sulphur season.
Three rivers in the NLP are running genuinely high and worth noting: the Clam River at 156% of median is the highest in the state outside of the Tahquamenon, the Thunder Bay River at 133% of median is elevated, and the Sturgeon River in the NLP is at 133% as well. Plan for high-water tactics on these three.
The lower-end concerns in the NLP are real but manageable. The Little Muskegon River is at 63% of median, the Looking Glass River is at 68%, the Maple River is at 63%, the Au Gres River is at 68%, the Red Cedar River is at 67%, and the Pigeon River in Ottawa County is at 65%. These are low flows, suitable for sight fishing and dry flies if conditions are right, but they are not the conditions you want if you prefer working deeper runs and drifts. The Muskegon River itself is at 81% of median, which is reasonable.
Southern Lower Peninsula: Limited Gauge Data
The Southern Lower Peninsula, home to excellent rivers like the Au Sable, Rifle, Boardman, and numerous spring creeks, has no gauged rivers reporting through the Michigan Trout Report network at this time. This does not mean the fishing is poor, only that anglers in that region will need to rely on local knowledge, contact with fly shops, or direct observation of water conditions. The general weather and regional conditions suggest that most southern Michigan trout streams are likely running near normal or slightly elevated given the pattern across the state, but you cannot confirm that without direct contact or local resources.
Where I Would Go This Week
If I had a single day to fish this week, I would drive to the Manistee River in the Northern Lower Peninsula. It is running at 122% of median, water temperature is at 54 degrees, and the river sits in the sweet spot between high and low. Caddis and sulphurs are building, and near-normal flows mean trout are feeding actively in traditional lies. If the Manistee feels crowded, the Pere Marquette River just downstream is at 104% of median and often receives less pressure; it is equally good right now.
If you prefer the UP and want to avoid the high flows on the Tahquamenon and Cisco Branch, the Salmon Trout River at 127% of median is still manageable and well worth the drive. It is cold, it is clean, and it is producing.
For detailed conditions on specific rivers near you, visit https://michigantroutreport.com.