14.8 mapped river miles, draining 44 square miles, in the Bad Montreal basin watershed. A USGS gauge stands in it, but its record is too short for a measured July mean, so what this page knows about its temperature is today's reading and 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.
This gauge stands in the Tyler Forks. Its record is too short for a July mean, so the class below is Wisconsin DNR's — but the reading is this water.
Tyler Forks is typed almost end to end — 38.0 of 39.33 NHD miles, 97 per cent — and the classification runs Cold ahead of Cool, 26.6 miles against 11.4. On coverage that complete the split describes the water rather than the file, though these pages cannot say which end each class sits at. Wisconsin DNR designates it Class II and Class III, managed as wild supplemented and as stocked. There is no gauge in it; the nearest is on the Presque Isle, 35.2 miles away. The channel is 16.3 feet across at the median, fourth order, draining 44.31 square miles over the 14.8 miles of axis mapped, of which 6.37 run inside the Iron County Forest and 0.38 through Copper Falls State Park. Five short tributaries come in below river mile 10.5.
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 14.8–14.7 | 6.6 | cool | — |
| RM 14.8–14.5 | 7.2 | cold | — |
| RM 14.7–14.7 | 4.8 | cool | — |
| RM 14.7–0.0 | 19.4 | cold | — |
Wisconsin DNR has classified 38.0 of the 39 miles NHD carries for this stream — 97% of it. The typed water splits 26.6 mi cold, 11.4 mi cool. 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.
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 →
2 units of public or open-access land touch this river, 181,905 acres in total. Acreage is the whole unit, not the part beside the water.
| Unit | Owner | Acres |
|---|---|---|
| Iron County Forest | county land | 178,368 |
| Copper Falls State Park | state natural-resources agency | 3,537 |
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.
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.
6 named streams meet this one. Confluence miles are above the mouth; the longest twelve are listed.
Tyler Forks sits in HUC 8 04010302, the Bad Montreal basin, and drains 44 square miles, Strahler order 4 at the mouth. 58 NHD reaches carry the name for 39.3 miles in total — more than the 14.8 miles of drawn mainstem, because NHD counts side channels and braids as their own reaches.
The closest 6 rivers on this site, straight-line from the middle of this one — not drive time.