Quick reference
| Field | Value |
|---|---|
| State / region | Wisconsin, northern Wisconsin (Lake Superior drainage, Douglas County) |
| Species | Brown trout, brook trout, rainbow trout, steelhead, lake-run brown trout, coho salmon |
| Best months | April–June for steelhead and resident trout; September–November for salmon and fall steelhead |
| Water type | Freestone with strong spring influence |
| Difficulty | Intermediate — regulations are complex and the lower river demands strong wading and deep presentations |
| Wading | Feasible on the upper river; demanding on the powerful lower reaches, where a staff is advisable |
Why fish here
The Bois Brule is a coldwater freestone–spring creek blend that runs through the Brule River State Forest to Lake Superior in far northern Wisconsin, and it packs two distinct fisheries into one system. The upper river fishes like a classic Northwoods trout stream — riffle, run, pool, wood cover, resident brook and brown trout. The lower river is a Great Lakes migratory fishery, with steelhead pushing up from Lake Superior in spring and fall and coho and chinook salmon following in autumn. Few Midwest rivers offer both in the same watershed, which is why anglers travel long distances to fish it.
The management backs up the reputation. Creel and regulation summaries show consistent catches of trout and salmon under protective size limits — including a 26-inch minimum on rainbows, with only one fish over that mark allowed — which points to both good numbers and the real possibility of a large migratory fish. The Wisconsin DNR manages the river with multiple regulation zones, fish refuges, and an extended season on the lower river that most Wisconsin trout streams do not get.
Access is the other advantage. The Brule River State Forest wraps the river corridor with designated angler parking lots, day-use access areas, and landings on both the upper and lower river, so an angler can cover many miles of water without relying on private permission. The trade-off is that the well-known lower-river access points get heavy pressure during the runs.
The river, section by section
Upper River — south of Highway 2 (inland trout reach)
Access: Brule River State Forest angler parking lots and day-use areas along forest roads. This entire reach closes before the first Saturday in May to protect spawning steelhead. Character: Small to medium trout stream, moderate gradient, classic riffle–run–pool structure with good overhead cover; cold flows from spring sources and forest shade. Species mix: Primarily resident brook and brown trout, with some rainbows. Steelhead spawn here — hence the spring closure — but targeted steelhead fishing happens downstream. Crowding: The quietest part of the river, though opening weekend and summer weekends fill the popular access lots. Weekdays are typically uncrowded outside holidays. Notable hatches: Early stoneflies and midges in spring, then general mayfly and caddis activity through late spring and summer. No formally documented local hatch chart — nymphs and attractor dries handle most situations.
This is the reach to pick for a trout-focused trip. Once it opens on the first Saturday in May, the upper Brule fishes like the Northwoods stream it is: work the forest access lots, cover water with a dry-dropper or attractor dries, and expect wild-feeling fish in tight, wooded quarters. Wading is generally feasible but gets tricky in faster riffles and around woody debris, so pick crossings carefully.
Middle River — Highway 2 to Winneboujou and Stone's Bridge
Access: The Highway 2 crossing plus well-marked state forest day-use access points; Stone's Bridge and Winneboujou Landing are the named public access sites on this corridor. Character: Medium-width river mixing long glides, defined pools, and broken riffles; gradient increases modestly toward Lake Superior. Wading runs moderate to challenging depending on flow, with deeper pools near the popular access points. Species mix: Resident brook and brown trout, plus steelhead moving through in spring and coho and chinook in fall. Rainbows here include both resident fish and migratory steelhead, all under the 26-inch harvest minimum. Crowding: Heavy during the steelhead run (late March–May) and fall salmon periods, especially near Stone's Bridge and Winneboujou. Summer trout fishing is more moderate but still popular. Notable hatches: Stonefly nymphs are the standard recommendation for the swift currents, especially in spring; general mayfly and caddis activity runs through late spring and summer.
The middle river is the transition zone, and it fishes like one — resident trout water that turns into migratory water on a seasonal schedule. During the runs, most anglers here are drifting egg patterns and heavy nymphs through the defined pools; in summer, the same pools revert to trout fishing. Stone's Bridge in particular offers large pools and good shoreline and is one of the best-known fly fishing spots in the state forest.
Lower River — below Winneboujou to Lake Superior (steelhead and salmon reach)
Access: Numerous state forest day-use access points north of Highway 2, including Winneboujou Landing and access toward the lower Brule near Lake Superior. Note the refuge zones: Box Car Hole (closed July 15–October 31), Mays Ledges (closed September 1–May 31), and the sea lamprey barrier zone, which is permanently closed. Character: Larger, powerful water — deeper pools, long runs, substantial current as the river drops to the lake. Width and depth increase significantly toward Lake Superior. Species mix: The high-profile migratory fishery: steelhead, coho and chinook salmon, plus resident brook and brown trout. Species-specific minimum lengths apply. Crowding: Very popular and often crowded during peak steelhead (late March–May) and fall salmon runs (September–November). Known holes can be extremely busy on weekends; midweek and shoulder windows offer more space. Notable hatches: Insects are present — stones, mayflies, caddis — but this reach is about eggs, nymphs, and streamers fished near the bottom, not matching surface hatches.
Wading here is possible but demanding, and many anglers work the deep runs from shore with drift-fishing "chuck and duck" or tight-line techniques. The refuge closures are strictly defined and worth mapping before a trip: the dates differ by zone, and fishing a closed refuge is illegal regardless of season elsewhere on the river.
Hatches and seasons
| Months | Hatches | Flies |
|---|---|---|
| Mar–Apr | Early stoneflies, midges; egg-drifting for steelhead matters more than surface activity | Stonefly nymphs (#6–8), egg patterns/glo-bugs (#8–12), Hare's Ear and Pheasant Tail nymphs (#12–16) |
| May–Jun | Mixed mayflies and caddis typical of northern Wisconsin; insect activity builds with warming water | Mayfly nymphs (#14–18), caddis pupae (#14–18), attractor dries — Elk Hair Caddis, Adams (#12–16) |
| Jul–Aug | Terrestrials plus continued caddis and smaller mayflies on the trout reaches; migratory fishing slows | Ants, beetles, hoppers (#10–16), small caddis and mayfly dries (#14–18), beadhead nymphs (#14–18) |
| Sep–Nov | Cooler-water midges and late caddis; focus shifts to coho, chinook, and late steelhead | Egg patterns (#8–12), large streamers (#4–8), stonefly and steelhead nymphs (#6–10) |
Recommended flies (by season)
| Season | Top patterns | Why |
|---|---|---|
| Spring | Large stonefly nymphs, egg patterns/glo-bugs, Hare's Ear Nymph, Pheasant Tail Nymph, small streamers | Steelhead and early trout hold in deep runs in cold water; heavy nymphs and eggs drifted near bottom are the standard approach, with generic mayfly nymphs covering building insect activity |
| Summer | Adams (Parachute Adams), Elk Hair Caddis, ants, beetles, hoppers, beadhead nymphs | Resident brook and brown trout feed on abundant surface and subsurface food in the upper and middle river; terrestrials produce along forested banks and overhanging cover |
| Fall | Egg patterns, large streamers (Woolly Bugger), stonefly and steelhead nymphs | Coho, chinook, and late steelhead key on eggs and larger prey; drift eggs and swing or dead-drift streamers through the deeper pools and runs of the lower river |
Gear notes
Two setups cover the Brule. For resident trout on the upper and middle river, a 9-foot 4–5 weight with a floating line, 9–12 foot leaders, and 4X–6X tippet handles dries and nymphs. For steelhead and salmon on the lower river, step up to a 7–8 weight with a strong reel, sinking or weight-forward lines (or a monofilament running line for drift fishing), and short, stout leaders in the 0X–3X range for large fish and deep presentations. Wading boots with real traction and a wading staff are advisable — currents are swift and the substrate uneven, especially on the lower river. Dress for cold, damp Northwoods conditions and bring polarized glasses for reading water.
Logistics
- Regulations: Managed by the Wisconsin DNR within the Brule River State Forest, with complex reach-specific rules. Anglers 16 and older need a Wisconsin license plus an inland trout stamp. The lower river runs an extended season from the last Saturday in March through November 15, five trout/salmon daily, with minimums of 8" brook trout, 10" brown trout, 12" coho and chinook, and 26" rainbow (one over 26" allowed). Other sections open the first Saturday in May at 5 a.m. through September 30; one reach north of Highway 2 is artificial-lures-only with a three-fish limit. Refuge closures: Box Car Hole (July 15–Oct 31), Mays Ledges (Sept 1–May 31), and the sea lamprey barrier zone (never open). Removing insect larvae from trout streams for bait is illegal except by hand during open season for immediate use on the same stream. Regulations change annually — check current WDNR Lake Superior and inland trout rules before fishing.
- Access points:
- Stone's Bridge — popular lower-middle river access with large pools and good shoreline
- Winneboujou Landing — well-marked day-use access on the lower river corridor
- Highway 2 Bridge — major crossing and the regulation boundary between upper and lower river
- Box Car Hole area — access corridor present, but the hole itself closes July 15–October 31
- Mays Ledges area — lower-river refuge, closed September 1–May 31
- Nearest towns: Brule, Superior, Ashland
- Closest gauge: USGS 04025500 — Bois Brule River at Brule, WI
When NOT to fish here
Skip the river during high, muddy spring runoff — wading turns unsafe and drift presentations fall apart, especially on the lower river, and flows and clarity can change fast after heavy rain. Respect the closed periods: the refuge zones and the pre-May closure south of Highway 2 are enforced, and fishing them during closed dates is illegal. Finally, peak steelhead and salmon weekends put serious crowds on the lower river's known holes; if solitude or less-pressured fish matter, fish weekdays or the shoulder windows instead.
Where to fish next
- Fly Fishing in Wisconsin — the full state guide
- Other Wisconsin Lake Superior tributaries — smaller North Shore streams run steelhead under the same Lake Superior regulations
- Northern Wisconsin inland trout streams — comparable freestone systems with brook and brown trout under WDNR inland rules