Union Lake
Polk County, Minnesota
(1)Today's Fishing Forecast
Fishing looks to be moderately active with peak fishing times around 3-5 PM. SEE MORE
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We want to see what you've caught on Union Lake.Frequently Asked Questions About Union Lake, MN
- How big is Union Lake?
- How deep is Union Lake?
- What kind of fish can you catch in Union Lake?
- What are the closest cities to Union Lake?
- Are there places to stay in the Union Lake area?
- Are there topographical lake maps available Union Lake?
- Are there boat launches on Union Lake?
- Are there places to eat and drink near Union Lake?
- What is the average air temp for Union Lake?
How big is Union Lake?
How deep is Union Lake?
What kind of fish can you catch in Union Lake?
Other fish species in the lake include Bluntnose Minnow, Central Mudminnow, Green Sunfish, Hybrid Sunfish, Iowa Darter, Spottail Shiner, Tadpole Madtom and White Sucker.
What are the closest cities to Union Lake?
Are there places to stay in the Union Lake area?
More Lodging Options
Are there topographical lake maps available Union Lake?
Are there boat launches on Union Lake?
Are there places to eat and drink near Union Lake?
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What aquatic invasive species are found in Union Lake?
Join us in the fight to prevent the spread of invasive species These sneaky creatures can hitch a ride on boats, clinging onto propellers, anchor lines, and trailers. They can even survive in hidden places like bilge water and ballast tanks, or disguise themselves in dirt and sand that sticks to nets, buckets, anchors, and waders. But don't worry, we have the power to stop them in their tracks with just a few simple steps. So let's do our part and protect our waters from these unwanted invaders.
History & Status of the Fishery
Union Lake is an 887-acre lake located in south central Polk County. The lake has a history of large fluctuations in water levels, which are influenced primarily by ground water. The most recent water level rises in the late 1990's resulted in the formation of a lake improvement district (LID) made up of riparian owners on both Sarah and Union lakes. The LID facilitated construction of a pumped outlet to the Sand Hill River watershed, following property damage along the lake's shoreline. A standard fisheries survey was conducted in early August 2022 to assess the fish populations at Union Lake.
Following a record high abundance of Walleye in 2012, Walleye gill net catch rates have declined in recent years. However, the 2022 catch rate of 6.3 Walleye per gill net is only slightly below the lake's historical average of 6.8 per net. Lengths of sampled Walleye ranged from 7.7 to 30.1 inches with an average of 19.0 inches. The Northern Pike gill net catch rate set a record high in 2022 at 11.9 fish per net. The historic average is 6.1 fish per net. Sampled Northern Pike ranged from 15.1 to 32.0 inches with an average of 21.9 inches. About 23% of the fish sampled were over 24 inches in length.
The trap net catch of Bluegill was well below average in 2022 with a catch rate of 8.3 Bluegills per net. The historical average for the lake is 36.6 per net. These fish averaged 6.0 inches in length and ranged from 3.3 to 8.4 inches. Black Crappie abundance increased slightly from recent surveys with trap nets capturing 3.6 per net. Black Crappie sampled in trap nets had an average size of 8.7 inches, but individuals up to 12.1 inches long were encountered. Gill nets caught Largemouth Bass at 1.8 fish per net. Largemouth Bass averaged 11.5 inches long, with Largemouth Bass up to 18.1 inches long measured. Yellow Perch abundance was low in 2022, with fish having an average length of 6.3 inches. Trap net catches of Common Carp were similar to past surveys, but gill nets captured a record number of fish in 2022. Other fish species sampled in 2022 included Black and Brown Bullhead, Pumpkinseed, and White Sucker.
What is the average air temp for Union Lake?
Union Lake Reviews
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More Nearby Lakes To Explore
There's more lake's to explore around Union Lake...| DISTANCE | ACRES | |
| Maltrod Lake | 1.2 mi | 17 |
| Unnamed Lake | 1.4 mi | 20 |
| Unnamed Lake | 1.4 mi | 17 |
| Unnamed Lake | 1.5 mi | 22 |
| Unnamed Lake | 1.6 mi | 116 |
| Unnamed Lake | 2.0 mi | 111 |
| Unnamed Lake | 2.1 mi | 44 |
| Unnamed Lake | 2.3 mi | 22 |
| Unnamed Lake | 2.4 mi | 15 |
| Rindahl Lake | 2.7 mi | 30 |
