Union Lake (Wright County)

Wright County, Minnesota - DNR stocking history, depth and survey data

Minnesota · Minnesota Department of Natural Resources (DNR) · DOW 86029800

Union Lake (Wright County) has no DNR stocking rows in LakeFinder; this page carries its DNR depth, access and survey data.

• Union Lake (Wright County) shows no stocking records in Minnesota DNR LakeFinder as of September 2, 2026.
• Maximum depth 35 ft; surface area 93 acres, 27 littoral acres, 1.5 miles of shoreline, per the DNR lake survey.
• Average water clarity (Secchi depth) 4.8 ft.
• Fish species DNR lists here: black bullhead, black crappie, bluegill, bowfin (dogfish), brown bullhead, channel catfish, common carp, hybrid sunfish, largemouth bass, northern pike, pumpkinseed, walleye, and 3 more.
• 1 public access on the DNR list.
• Most recent DNR fish survey: May 31, 2022 (targeted survey).
• Wright County, nearest town South Haven; DNR lake number (DOW) 86029800.

Depth map

Bathymetric contours from the Minnesota DNR lake survey mapped 8/7/1970 (orig map); depths in feet. Simplified for the web; not for navigation.

Public accesses

DNR fish survey, 2022

Catch per net (CPUE) is the DNR survey's count per gill net or trap net set; higher means more of that species were sampled, not a fishing forecast. Top species per gear shown; where we have no verified common name for a DNR code, the code itself is shown.

Union is a small-sized lake (93 acres) located southwest of the City of South Haven in Wright County. Union has 1.5 miles of shoreline and a maximum depth of 35 feet. A state-owned public access with a cement boat ramp and a very small amount of parking is present on the south shore. Water clarity is typically fair to moderate and submergent vegetation is often sparse to moderate in abundance at Union. A spring trap netting survey was conducted during May 2022. Trap nets were used to target Bluegill and Black crappie. Spring trap net data should not be compared to historical summer trap net data, as summer nets often do a poor job of representatively sampling Bluegill. High numbers of Bluegill were collected and fish were 3 to 8 inches long, averaging 6 inches. Approximately 38% of the sample was 7 inches or longer, indicating that a good proportion of the fish sampled were keeper-sized. Bluegill were age-2 to age-11 with ten year classes being present. Moderate numbers of Black Crappie were collected, averaging almost 8 inches in length. The longest crappie collected was just over 12 inches in length. Black Crappie were age-1 to age-11 with ten year classes being present. Moderate numbers of Pumpkinseed Sunfish were captured, averaging just over 5 inches in length. The longest Pumpkinseed Sunfish collected was just over 7 inches long. Pumpkinseed Sunfish were age-3 to age-8 with six year classes being present. People can have significant impacts on lakes and the fish populations they support. Over harvest, lakeshore development, removal of shoreline vegetation, and introductions of invasive species can all adversely affect fish populations. Aquatic invasive species (AIS) are typically moved from infested to non-infested waters by anglers, boaters and lakeshore owners, and can adversely impact lakes and fish populations. To avoid spreading AIS, lake users are required to remove all aquatic plants and animals from their watercraft and drain all lake water from their boat and bait buckets before leaving the lake. If you suspect an infestation of an invasive species in this lake, save a specimen and report it to a local DNR office. Additional information on all of these topics can be found on the DNR website (www.dnr.state.mn.us) or by contacting the Hutchinson Area Fisheries office.

Minnesota DNR survey narrative, May 31, 2022.

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