Lannon

Lannon is a shallow, winterkill-prone lake located one half mile south of Graceville in west-central Minnesota. US highway 75 divides it into east and west basins. The east basin, west basin and East Toqua Lake are connected through culverts. Fish movement occurs among the three basins and fish assemblages are similar. Lannon Lake can provide valuable spawning and nursery habitat for fish from East Toqua, especially northern pike during springs with sufficient water levels. No public boat ramp exists on Lannon Lake and access is limited to the public road rights-of-way. This 2024 standard survey was conducted to collect routine fish population data using a gill net and trap nets. These data can be compared to historical standard and targeted survey data from Lannon Lake. Low oxygen levels caused most gamefish to die in Lannon and East Toqua lakes during the winter of 2022-2023. Walleye fry were stocked into Lannon in 2023 and will continue to be stocked annually. Walleye, perch and crappies were stocked into East Toqua Lake. Walleyes were abundant in the 2024 survey from the stocked 2023 year class and averaged 10.5 inches. A few walleyes from 17 to 23 inches were also caught. Low numbers of northern pike, yellow perch and crappies were caught. Other species included high numbers of black bullheads and common carp, as well as low numbers of bigmouth buffalo, white suckers and quillback carpsuckers. Management activities for Lannon Lake include annual walleye fry stocking, winter dissolved oxygen monitoring and fishery surveys.

Lannon is a shallow, winterkill prone lake located one half mile south of Graceville in west-central Minnesota. US highway 75 divides it into east and west basins. The west basin is connected to East Toqua Lake by a culvert through County Road 20. Fish movement occurs among the three basins and their fish assemblages have been similar. Lannon Lake can provide valuable spawning and nursery habitat for fish from East Toqua, especially Northern Pike during springs with sufficient water levels. No public boat ramp is present on Lannon Lake and access is limited to foot travel from public road right-of-ways. This standard survey was conducted to collect routine fish population data using gill nets, standard trap nets and quarter-inch trap nets. These data can be compared to historical standard and targeted survey data from Lannon Lake. In 2017 Walleyes were abundant. Multiple year classes were present, though the majority were from 2016 and 2014. These fish averaged 10 and 17 inches, respectively. Walleyes up to 26 inches were also caught. Walleye fry are routinely stocked into Lannon and East Toqua Lakes to create a fishery and reduce the numbers of carp and bullheads. Yellow Perch and Northern Pike were moderately abundant. Perch measured 7 to 11 inches, averaging 8 inches. Pike measured 19-32 inches, averaging 25 inches. Although pike grow quickly in Lannon Lake, they tend to be short lived due to a lack of a cool water refuge during the heat of summer. Few pike have been sampled older than age three. Adult Black Crappies were caught in low numbers, but young-of-the-year crappies were abundant. Other fish species sampled included moderate numbers of Black Bullheads and Common Carp, as well as low numbers of Bigmouth Buffalo, White Suckers and Yellow Bullheads. Bullheads up to 12 inches long were caught.

Lannon is a shallow, winterkill prone lake located near the city of Graceville in west-central Minnesota. US highway 75 divides it into east and west basins. The west basin is connected to East Toqua Lake by a culvert through County Road 20. Fish movement occurs among the three basins and fish assemblages are somewhat similar. Lannon Lake can provide valuable spawning and nursery habitat for East Toqua, especially for northern pike during springs with sufficient water levels. Public access is limited to carry-in areas along U.S. Highway 75. Yellow perch were abundant in 2014. The majority were around six inches, but fish up to 11 inches were present. Anglers can expect the perch to measure 9-10 inches by fall, 2015. Northern pike were moderately abundant and measured 14-29 inches. Although pike grow quickly in Lannon Lake, they tend to be short lived due to a lack of a cool water refuge. Few pike have been sampled older than age three. Black crappie and walleye were caught in low numbers. Walleye fry are stocked annually to maintain the population and in an attempt to reduce recruitment of carp and bullheads through predation. Other fish species sampled included moderate numbers of black and yellow bullhead, and common carp, as well as low numbers of bigmouth buffalo and white sucker. Bullheads were caught up to 11 inches.

Based on Minnesota DNR survey data, anglers target Walleye, Northern Pike, White Crappie, Black Crappie, and Yellow Perch in Lannon. See the full species list above for catch rates, size structure, and quality scores.

We don't have a confirmed public access point on record for Lannon. Check the DNR LakeFinder page for current access details before you go.

Lannon has a maximum depth of 4 feet, per Minnesota DNR data.

The most recent Minnesota DNR survey data for the main sport fish in Lannon is from 2024.

No invasive species are on record for Lannon in Minnesota DNR data. Always clean, drain, and dry your equipment to help keep it that way.