Seven hundred cfs at the Highway 64 bridge
Check the number before you drive. USGS 04074950 is at the State Highway 64 bridge at Langlade, in the middle of the trout water, and it is the number the regulars use. In an April 2020 WXPR piece, fly angler Bill Kallner and his fishing partner said that at 1,500 cfs they could not wade the river safely and that they wait for it to drop to around 700; Tim Waters of the Wolf River Fly Shop in Hollister fishes it higher than that, and told Fox 11 in April 2026 that he does it with a wading staff, by reading the surface, and by not going to the same places. The older way of talking about the level is Cap's scale, the reference Cap Buettner, one of the river's old names alongside Ed Haaga and Bob Talasek, left behind and that FlyFishingWisconsin says people still quote.
The USGS record at Langlade runs from 1966. Monthly means are about 300 cfs in January and February, 461 in March, 813 in April, 625 in May, 497 in June, 369 in July, 317 in August, 379 in September and 423 in October. The 250 to 700 cfs range on this page is the top end Kallner quoted and the low end of the summer record; above 700 leave the wading staff in the truck and fish from the bank or wait.
County T down to the Menominee County line
The DNR's Upper Wolf River Fishery Area page says trout are most prevalent from County Highway T downstream to the county line, which is the Menominee Indian Reservation boundary, and its angler-diary program calls that a 35-mile stretch of wild river that is nearly impossible to sample with shocking gear because of the rapids. Waters puts the good trout fishing near Hollister at about 30 miles. Five tributaries join in Langlade County: Swamp Creek, Pickerel Creek, the Hunting River, the Lily River and Ninemile Creek. The Wolf here is an Outstanding Resource Water, wide, boulder-strewn and undeveloped, with a steep gradient in many places.
Above County T, from the Post Lake dam down to Lily, the DNR says walleye, northern pike, musky and bass are the fish, and smallmouth live the full length of the river in the county. The DNR properties along the river are many and scattered; the Fishery Area page links four printable maps, and FlyFishingWisconsin's advice is to pick up the Wolf River trout land map sold in local stores and expect long walks in to the water that fishes best. Below the reservation the river passes Shawano and New London on its way to Lake Poygan; the hub's other gauges at New London and Winneconne read that lower, warmwater river, not the trout water.
Rafts from 8 to 7, rises at dusk
The Wolf is a whitewater river with a raft industry, and the DNR's page lists the commercial outfitters and the annual races as part of the property's character. FlyFishingWisconsin notes the local ordinance that keeps rafts from launching before 8 a.m. and requires them off the water by 7 p.m., and that charts posted at some accesses show the latest time a raft should reach each point. The trout hatches here run late in the afternoon and into dark, so the practical schedule is to fish early, tie flies or fish a spring pond through the middle of the day, and be on the water when the rafts are off it.
Respect is the word every source uses. FlyFishingWisconsin calls the river big, powerful and dangerous, no place for a beginning wader, and Waters says it goes down fairly quickly but is dangerous when high. The trout population is maintained by stocking because summer temperatures limit natural reproduction, but holdover is good and the fish that have been in the river a year or two are not easy.
The Cream Fly and the two drakes
Mayflies are the reason people drive here. FlyFishingWisconsin says the Cream Fly, Potamanthus, hatches in Wisconsin only on the Wolf, that a Catskill Light Cahill, parachute or Wulff imitates it, and that the Brown Drake can be a blizzard when the weather lines up. FlyFishFinder's Wisconsin chart names the Wolf as a premier Hex river in late June and early July on warm, calm evenings, and puts Hendricksons here in early May, later than the Driftless. Ed Haaga's Adams Hairwing, an old Wolf pattern, is still tied for the larger mayflies.
WiFlyFisher's northern Wisconsin chart, which lists the Wolf among its rivers, frames the season this way: Baetis from the last week of March until late June and back in September; Hendricksons roughly April 20 to May 15; Sulphurs in the last ten days of May and the first of June; March Brown and Gray Fox, the same insect here, overlapping the Sulphurs and running most of June; Light Cahills and Brown Drakes both in June; Hex opening around June 15 and lasting into the first week of July; Isonychia all summer from late June; Tricos in July; and the White Fly through August. Midges, stonefly nymphs and caddis matter on this river too, but they are the second string.
Three trout, a slot, and a November catch-and-release season
The 2026-2027 Langlade County listing for the Wolf River downstream from County T is a Red water. During the general season, April 4 through October 15, 2026, the daily bag is 3 trout in total: brown and rainbow trout must be under 12 inches, except that 1 trout may be over 18 inches, and brook trout must be over 8 inches. From October 16 through November 15, 2026 the same reach has a catch-and-release season, all trout released, artificial lures only. The early-season list names Langlade County's Plover and Wolf rivers, which is why the Wolf also opens January 3, 2026 to artificials with a zero bag through April 3. Above County T the county base rule applies: 5 trout of any length.
Across the line, Menominee County is a reservation. The guide says access to streams on reservation land must be with landowner permission or from public land such as roads, and that state law applies to non-tribal anglers there; tribal policies are posted at tribal headquarters. Fishing hours on opening day begin at 5 a.m. Waters' shop in Hollister and the Antigo chapter of Trout Unlimited, a DNR partner on the fishery area, are the two local places to ask what the river is doing this week.