Chris Izworski, reporting from Michigan on the current state of trout fishing, turns this morning to the Black River near Bessemer, one of the Upper Peninsula’s most genuinely wild brook trout fisheries. The question facing any angler considering the drive is straightforward: the river is running 268 cubic feet per second, which is about 75 percent of the historical median for May 6. That’s fishable water, though not ideal, and it matters whether you’re prepared for what that means on a stream that flows remote and cold through the Porcupine Mountains.

Why This River Matters Right Now

The Black River is not a forgiving place to learn trout fishing, nor should it be. It’s a freestone brook and brown trout stream in country that feels genuinely removed from the rest of Michigan, and that remoteness is precisely what makes it worth the drive. May is one of the best months on Michigan trout water, and the UP’s late spring window, even as it extends into early June some years, presents hatches that build steadily through the month. Caddis are moving now. Sulphurs will emerge in the evening hours. Blue-winged olives will work the overcast periods. The trout know this calendar as well as you do.

What complicates the picture is the hydrology of the UP itself. This far north, deep snowpack releases through April and persists into early May most years. A river that looks fishable on the gauge can still be carrying debris, warming slowly, and pushing water through its channels with an edge that makes wading uncertain and fly presentations difficult. The Black River today sits near normal, which is the best news you could ask for in early May at these latitudes. That said, near normal is not the same as ideal.

Today’s Water: Fishable, But Pick Your Water

The gauge height of 2.91 feet and flow of 268 cfs reflect a river that has dropped from the heavier runoff of April. The water temperature reading is unavailable from the gauge station, which means you should expect cool conditions typical for early May on a remote UP stream. If you’re making the drive today, you’re fishing a river that the conditions rater calls fair. That means fishable, but it means you cannot fish blindly. You need to find the right pieces of water.

On a freestone stream at this flow, that means focusing on the edges. Run the longer pools where the current breaks. Work the riffles where the gradient steepens and the water froths white. Avoid the heavy main current pushing through the center of wider pools, which at this flow is carrying cold, oxygenated water but also pushing trout tighter to the banks and into the broken water where they feel secure. This is not a day for lazy casting across meadow water. You’re hunting for specific lies.

The Hatch Window and Your Evening

Sulphur hatches on the Black River are evening affairs, typically running from 7 to 9 p.m. This time of year, that window stretches across the golden hour and into near-full darkness. Sunrise today comes at 6:39 a.m. and sunset at 9:15 p.m., which means you have a 14-hour-plus day to work with. That’s the gift of late May latitude. Your best dry fly window for the sulphur hatch runs from 7:45 p.m. through the end of civil twilight at 9:15 p.m. By the time you’re seeing rises to sulphurs, the light is poor, which is why small flies on long, fine tippet become mandatory. Fish a Sulphur Comparadun or Parachute in size 14 first, then drop to the Sparkle Dun in 16 if the rises continue heavy. Keep 5X or 6X fluorocarbon ready. The spinner fall that follows is nearly impossible to time without experience on this water, but a Rusty Spinner size 16 or 18 is worth having tied on if you’re fishing after dark.

Before the evening hatch builds, other insects are moving. Early brown stoneflies are skittering across the surface. Hendricksons have been present throughout May on this drainage. Blue-winged olives will rise during any overcast period. An Elk Hair Caddis in brown, size 14, is a reasonable searching pattern that covers ground while you’re working toward that sulphur window. If you see rises, have Hendrickson dries in size 12 ready, and be prepared to nymph the riffles with a size 12 Hendrickson Nymph or Red Quill before committing to the dry fly.

Access and Practical Details

The Black River Harbor Recreation Area provides access. County road entry points offer additional possibilities, though familiarity with the water matters here more than on more popular streams. The water is remote enough that you should be prepared for solitude and for the fact that you’re responsible for your own safety and navigation. The scenic waterfalls and Porcupine Mountains setting are not incidental to the fishing. They define the character of the place.

General state trout regulations apply, though you should verify any special UP regulations before wading. The brook trout population here is the primary draw. Browns are present, but this is brook trout country.

The Decision

If you’re equipped for picking specific water, if you understand that fair conditions mean selective fishing rather than easy fishing, and if the evening sulphur window appeals to you more than the afternoon, the Black River today is worth your time. The water is down from runoff but not low. The hatches are building. The trout are active. This is May, and May on a wild UP stream is legitimate fishing.

For live gauge data and updated conditions, check https://michigantroutreport.com.