Union Lake is a fishing water in Branch County, Michigan (Southern Lake Michigan management unit).
Fishing pressure is our estimate of how busy Union Lake (Branch County) is likely to be today. It looks at the day of the week, the time of year, and whether the lake has been stocked recently, because fresh stockings tend to draw anglers. Lower pressure usually means more room to work the water for black crappie, bluegill and brown trout.
Expect other anglers. Arrive early or fish early morning for best results.
Estimate based on day of week, season, and recent stocking. Not a live crowd count.
Combined bite activity across all 37 species in this lake.
| Species | Min size | Daily limit |
|---|---|---|
| Black Crappie | None | 25 sunfish combined |
| Bluegill | None | 25 sunfish combined |
| Brown Trout | 8" (most inland lakes) | 5 trout, max 3 over 15" |
| Channel Catfish | 12" | 10 |
| Largemouth Bass | 14" | 5 bass combined |
| Northern Pike | 24" | 2 |
| Rainbow Trout | 8" (most inland lakes) | 5 trout, max 3 over 15" |
| Splake | 8" (most inland lakes) | 5 trout, max 3 over 15" |
| Walleye | 15" | 5 |
| Redear Sunfish | None | 25 sunfish combined |
* Records shown are from our database. For the most current data, visit the Michigan DNR directly.
* Forecast is based on historical DNR data and is not a guarantee of future stocking.
One public access site is listed for Union Lake. Select a launch for details. Details come from the Michigan DNR boating access data and can change, so check posted signs on site. See all Branch County boat launches.