BirdTrout
Marengo River, Wisconsin
23 mapped river miles, draining 78 square miles, in the Bad Montreal basin watershed. No gauge stands in it; the nearest is 12.4 miles away, and what this page knows about its temperature is Wisconsin DNR's classification of the water itself.
50°F and colder is cold, through cold-transitional and cool, to warm above 70°F — the same four bands, breaking at 58, 64 and 70°F, that the app paints. Grey is water nobody has measured.
The nearest live reading
The nearest gauge is 12.4 miles away, at Bad River Near Odanah, Wi — not a reading of this water, but of what the region is doing today.
The character of the water
Every mile of the Marengo is classified — 55.0 typed against 55.07 NHD miles, 100 per cent — and the classification is not uniform: 40.7 miles run Cool against 14.3 Cold. On complete coverage that is a real description of the river rather than a partial file's artefact, though these pages cannot say which end each class sits at. Wisconsin DNR designates the water Class II and Class III, managed as wild supplemented and as stocked, which points the same way as the Cool majority. There is no gauge in it; the nearest is on the Namekagon, 24.8 miles off. The channel is 21.1 feet across at the median, fifth order, draining 77.51 square miles over 22.7 mapped miles, and 11.66 of those run inside the Chequamegon National Forest. Four named tributaries come in between river miles 3.1 and 19.7.
Thermal classification
Wisconsin DNR's classification of this water, reach by reach. A class, not a temperature — no July mean, because none was measured here.
| Reach | Typed miles | Band | Wisconsin DNR type |
|---|---|---|---|
| RM 22.7–8.4 | 14.3 | cold | — |
| RM 8.4–0.0 | 40.7 | cool | — |
Wisconsin DNR has classified 55.0 of the 55 miles NHD carries for this stream — 100% of it. The typed water splits 40.7 mi cool, 14.3 mi cold. The untyped reaches are not warm water — they are water Wisconsin DNR's inventory does not reach, and the mile ranges above span only the reaches it does.
Questions about this river
- Marengo River fishing report — what it reads right now
- When to fish the Marengo River — hatches, seasons and temperature
- How to get to the Marengo River — access, parking and public land
- Marengo River fishing regulations — season, size and gear by reach
Wisconsin DNR classification
Wisconsin DNR classifies this water as Class II and Class III. More than one class appears because the classification changes along the river. The thermal bar above shows where. The management tier on those reaches is stocked, wild supplemented. This is a designation of the fishery, not the season and creel rules — those change yearly and live with the agency.
WDNR trout stream classification →
Public land on the river
1 unit of public or open-access land touches this river, 948,495 acres in total. Acreage is the whole unit, not the part beside the water.
| Unit | Owner | Acres |
|---|---|---|
| Chequamegon National Forest | U.S. Forest Service | 948,495 |
Species
Wisconsin DNR designates this as trout water — Class II, Class III — without naming the species. No fish survey or stocking record for this water is in the files this site reads.
Hatches on this water
42 insects are recorded from northern Wisconsin, which is the region this river sits in. That is a claim about the region and not a survey of this stream: nobody has recorded which of them has been caught here. Open the river in the app and the hatch panel will narrow it to the ones whose temperature window today's reading is inside.
| Insect | Peak | Water | Size |
|---|---|---|---|
| Fish Eggs Other |
October–January and April | 33–60°F | #10–16 |
| Little Brown Stonefly Taeniopteryx / Strophopteryx spp. |
February–April | 38–50°F | #12–16 |
| Blue-Winged Olive Baetis spp. |
March–May and September–November | 38–58°F | #16–22 |
| Blackfly Simulium spp. |
April–June | 40–65°F | #18–22 |
| Cranefly Tipula spp. |
April–June and September–October | 40–65°F | #6–10 |
| Grannom Brachycentrus spp. |
April–May | 48–58°F | #14–16 |
| Green Rock Worm / Green Weenie Rhyacophila spp. |
April–June and September–October | 45–68°F | #10–14 |
| Hendrickson Ephemerella subvaria |
April–May | 45–58°F | #12–14 |
| Alderfly Sialis spp. |
May–June | 52–66°F | #10–14 |
| Caterpillar Lepidoptera larvae |
May–September | 55–75°F | #8–14 |
| Crayfish Orconectes spp. |
May–October | 55–78°F | #4–8 |
| Giant Black Stonefly (Salmonfly) Pteronarcys dorsata |
May–June | 50–62°F | #4–6 |
| Green Sedge Rhyacophila spp. |
May–August | 48–64°F | #12–16 |
| Light Cahill Maccaffertium ithaca |
May–July | 55–68°F | #12–16 |
And 28 more — the year-round records, mostly: midges, scuds and sculpins, which are in the water every day and are therefore never the news.
Tributaries and watershed
4 named streams meet this one. Confluence miles are above the mouth; the longest twelve are listed.
- Morgan Creek 7.5 mi · RM 7.6
- Whisky Creek 4.9 mi · RM 18.9
- Little Spring Creek 2.7 mi · RM 3.1
- Blaser Creek 2.4 mi · RM 19.7
Marengo River sits in HUC 8 04010302, the Bad Montreal basin, and drains 78 square miles, Strahler order 5 at the mouth. 141 NHD reaches carry the name for 55.1 miles in total — more than the 22.7 miles of drawn mainstem, because NHD counts side channels and braids as their own reaches.
Other water nearby
The closest 6 rivers on this site, straight-line from the middle of this one — not drive time.