CASS RIVER AT FRANKENMUTH, MI
CASS RIVER MI USGS
CASS RIVER AT FRANKENMUTH, MI (04151500) is a real-time streamflow monitoring station on the CASS RIVER in MI, operated by the U.S. Geological Survey. Riverbot tracks its streamflow and alerts anglers the moment flow and temperature hit their fishing window. 18 fish species are associated with this station in public fish records.
- USGS site number
- 04151500
- Operated by
- U.S. Geological Survey
- State
- MI
- Coordinates
- 43.3278, -83.7480
Live conditions & history
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7-day weather
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Fishing regulations
MI state-wide default defaultDefault area rules for fish in the public records above. A grey row means the release has no canonical regulation match for that species.
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Walleye Open · Harvest allowed within limits Open all year Details
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Open all year
- Daily limit
- 5
- Size rule
- 15"
Official rule · retrieved Aug 2, 2026
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Black Crappie No season data
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Central Mudminnow No season data
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Common Shiner No season data
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Creek Chub No season data
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European Carp No season data
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Goldfish No season data
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Greater Redhorse No season data
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Green Sunfish No season data
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Iowa Darter No season data
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Johnny Darter No season data
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Largemouth Bass No season data
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Pumpkinseed × Green Sunfish No season data
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Round Goby No season data
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Shorthead Redhorse No season data
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Smallmouth Bass No season data
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Western Pirate Perch No season data
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Yellow Bullhead No season data
Effective Jan 1, 2026 – Sep 14, 2027 · evaluated for 2026-09-11 in America/Detroit
Regulations shown are for reference only and may not reflect in-season changes. Always verify current regulations with the Michigan Fishing Regulations before fishing.
Fish recorded near this station
Community observations nearbyCass River At Frankenmuth, Mi has 18 fish species documented via iNaturalist research-grade observations within 10 km. These community-sourced records indicate fish presence in the vicinity.
Species include: Yellow Bullhead (Ameiurus natalis), Western Pirate Perch (Aphredoderus gibbosus), Goldfish (Carassius auratus), European Carp (Cyprinus carpio), Iowa Darter (Etheostoma exile), and 13 others.
- Yellow Bullhead Ameiurus natalis
- Western Pirate Perch Aphredoderus gibbosus
- Goldfish Carassius auratus non-native
- European Carp Cyprinus carpio non-native
- Iowa Darter Etheostoma exile
- Johnny Darter Etheostoma nigrum
- Green Sunfish Lepomis cyanellus
- Pumpkinseed × Green Sunfish Lepomis gibbosus × cyanellus
- Common Shiner Luxilus cornutus
- Smallmouth Bass Micropterus dolomieu
- Largemouth Bass Micropterus nigricans
- Shorthead Redhorse Moxostoma macrolepidotum
- Greater Redhorse Moxostoma valenciennesi
- Round Goby Neogobius melanostomus non-native
- Black Crappie Pomoxis nigromaculatus
- Walleye Sander vitreus
- Creek Chub Semotilus atromaculatus
- Central Mudminnow Umbra limi
3 species above are flagged non-native or potentially invasive (Goldfish, European Carp, Round Goby). Records show what has been observed near this station, not what is native to the watershed.
Where these records come from
- Evidence
- Community observations nearby
- Research-grade community observations (iNaturalist) recorded near this station, not a formal survey.
- Records
- 18 species
- from 20 individual records
- Observed
- Jun 20, 2017 – Aug 22, 2025
- 20 dated records
Sources
- iNaturalist research-grade fish observations — 20 records
🪰 Hatch Calendar
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A month-by-month hatch calendar for this river — which insects are emerging now, hook sizes, and patterns to fish — collected from fly shops and guides who know it.