THORNAPPLE RIVER NEAR CALEDONIA, MI

THORNAPPLE RIVER MI USGS

THORNAPPLE RIVER NEAR CALEDONIA, MI (04118000) is a real-time river monitoring station on the THORNAPPLE RIVER in MI, operated by the U.S. Geological Survey. Riverbot tracks its river conditions, including water level and keeps recent, datum-labelled water-level history for anglers. 31 fish species are associated with this station in public fish records.

USGS site number
04118000
Operated by
U.S. Geological Survey
State
MI
Coordinates
42.8111, -85.4834

Live conditions & history

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Fishing regulations

MI state-wide default default

Species regulated in this area

These are species and groups covered by the applicable area rules, not a claim that they occur at this station.

Default rules for this area. A grey row means the current season status is not confirmed by this release.

MI state-wide default default only. Water-specific, national-park, sanctuary, licence, and in-season exceptions may apply.

Effective Jan 1, 2026 – Sep 14, 2027 · evaluated for 2026-10-26 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 nearby

Thornapple River Near Caledonia, Mi has 31 fish species documented via iNaturalist research-grade observations within 10 km. These community-sourced records indicate fish presence in the vicinity.

Species include: Rock Bass (Ambloplites rupestris), Bullheads (Ameiurus), Yellow Bullhead (Ameiurus natalis), Eyetail Bowfin (Amia ocellicauda), White Sucker (Catostomus commersonii), and 26 others.

One species above is flagged non-native or potentially invasive (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
31 species
from 106 individual records
Observed
May 10, 2018 – Jul 27, 2026
106 dated records

Sources