8.7 mapped river miles, draining 17 square miles across Allegan county, in the Kalamazoo subbasin watershed. No gauge stands in it; the nearest is 3.7 miles away, and what this page knows about its temperature is MDNR'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 gauge is 3.7 miles away, at Kalamazoo River At New Richmond — not a reading of this water, but of what the region is doing today.
The pills above go to USGS. These are this site's pages for the same gauges — a thirty-day chart, the monthly means, the record, and today's reading against the five-year normal for today: 04108660.
Mann Creek is small water, 8.7 mapped miles in Allegan County, 14.0 feet wide at the median on a 17.35-square-mile drainage at Strahler order 3. MDNR typing is unusually complete here, 8.8 miles against 8.7 mapped, and it splits the stream cleanly in two: the upper 4.2 miles, from river mile 8.7 down to 4.6, are Warm stream on a medium gradient, while the lower 4.6 miles, from river mile 4.6 to the mouth, are cold transitional on low gradient. The class describes the valley segment rather than measured water; the nearest gauge is 3.7 miles off. Type 1 regulations cover 8.4 miles, open the last Saturday in April through September 30th, with artificial lures and all types of natural bait allowed and a creel of 5 fish, no more than 3 of them 15 inches or greater. Brown trout have been stocked at 128th Avenue since 1984 and continue through 2026. No access sites are mapped.
MDNR types this water from its valley, not from a thermometer in it. A class, not a temperature — no July mean, because none was measured here.
| Reach | Typed miles | Band | MDNR type |
|---|---|---|---|
| RM 8.7–4.6 | 4.2 | warm | Warm stream · medium gradient |
| RM 4.6–0.0 | 4.6 | cold-transitional | Cold transitional stream · low gradient |
MDNR has classified 8.8 of the 8.7 miles NHD carries for this stream — 101% of it. The typed water splits 4.6 mi cold-transitional, 4.2 mi warm. The untyped reaches are not warm water — they are water MDNR's inventory does not reach, and the mile ranges above span only the reaches it does.
MDNR trout stream types, as designated. Types on file cover 8.4 of the 8.7 mapped miles; 0.3 miles carry no type in this dataset. Always check the current Michigan Fishing Guide before you fish — this is a copy, and the Guide is the rule.
| Type | Where | Season | Minimum sizes |
|---|---|---|---|
|
Type 1 8.4 mi |
RM 8.7–0.0 | Last Saturday in April–September 30th | Brook trout 7", Brown trout 8", Rainbow trout / steelhead 10", Lake trout 10", Chinook salmon 10", Coho salmon 10", Pink salmon 10", Atlantic salmon 10" |
Creel across all types: 5 fish, with no more than 3 trout 15“ or greater. Zero (0) Arctic Grayling. Tackle: Artificial lures and all types of natural bait may be used.
2 units of public or open-access land touch this river, 36,226 acres in total. Acreage is the whole unit, not the part beside the water.
| Unit | Owner | Acres |
|---|---|---|
| Allegan | Michigan DNR | 26,797 |
| Allegan State Game Area | Michigan Department of Natural Resources | 9,428 |
Stocked, per the MDNR record: Brook trout, Brown trout. The most recent plants are Brown trout at 128th Avenue (Allegan Co., through 2026); Brook trout at 130th Avenue (Allegan Co., through 1992); Brook trout at Mann Creek (Allegan Co., through 1991).
47 insects are recorded from southern lower Michigan, 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 Black Stonefly Allocapnia / Capnia spp. |
January–April | 34–46°F | #16–18 |
| 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 |
| Blue Quill Paraleptophlebia adoptiva |
April–May | 44–56°F | #16–18 |
| Cranefly Tipula spp. |
April–June and September–October | 40–65°F | #6–10 |
| Grannom Brachycentrus spp. |
April–May | 48–58°F | #14–16 |
| Hendrickson Ephemerella subvaria |
April–May | 45–58°F | #12–14 |
| Little Black Caddis Chimarra atterima |
April–May | 46–58°F | #16–20 |
| Caterpillar Lepidoptera larvae |
May–September | 55–75°F | #8–14 |
| Crayfish Orconectes spp. |
May–October | 55–78°F | #4–8 |
| Light Cahill Maccaffertium ithaca |
May–July | 55–68°F | #12–16 |
| Little Sulphur Ephemerella dorothea |
May–July | 50–62°F | #16–20 |
And 33 more — the year-round records, mostly: midges, scuds and sculpins, which are in the water every day and are therefore never the news.
1 named stream meets this one. Confluence miles are above the mouth; the longest twelve are listed.
Mann Creek sits in HUC 8 04050003, the Kalamazoo subbasin, and drains 17 square miles, Strahler order 3 at the mouth. 6 NHD reaches carry the name for 8.7 miles in total.
The closest 6 rivers on this site, straight-line from the middle of this one — not drive time.