Brule

A temperature-dissolved oxygen profile was collected in the deepest basin on Brule Lake on August 24th, 2023, to evaluate the amount of cold, oxygenated water (i.e., oxythermal habitat) available to Cisco, also known as Tullibee. Based on the profile, the top of the thermocline (i.e., the location in the water column with the sharpest transition from warm to cold water) occurred at approximately 23 feet. Dissolved oxygen decreased to below 3.0 mg/L at 60.4 feet, which was below the thermocline, at the time of sampling. The temperature at which dissolved oxygen decreased to below 3.0 mg/L (i.e., TDO3, a single variable to characterize oxythermal habitat) was 8.8°C (47.8°F). TDO3 values cooler than 21.5°C indicate that oxythermal conditions are favorable for Cisco. Dissolved oxygen concentrations below the thermocline indicate that suitable oxythermal habitat for Cisco was available across a range of depths at the time of sampling during the summer of 2023. Data collected in 1977 and 1983 also indicated suitable oxythermal habitat. When adequate oxythermal habitat is available, Cisco are not squeezed into unfavorable, warmer water conditions and therefore do not experience higher levels of stress.

A temperature-dissolved oxygen profile was collected in the deepest basin on Brule Lake on August 24th, 2023, to evaluate the amount of cold, oxygenated water (i.e., oxythermal habitat) available to Cisco, also known as Tullibee. Based on the profile, the top of the thermocline (i.e., the location in the water column with the sharpest transition from warm to cold water) occurred at approximately 23 feet. Dissolved oxygen decreased to below 3.0 mg/L at 60.4 feet, which was below the thermocline, at the time of sampling. The temperature at which dissolved oxygen decreased to below 3.0 mg/L (i.e., TDO3, a single variable to characterize oxythermal habitat) was 8.8°C (47.8°F). TDO3 values cooler than 21.5°C indicate that oxythermal conditions are favorable for Cisco. Dissolved oxygen concentrations below the thermocline indicate that suitable oxythermal habitat for Cisco was available across a range of depths at the time of sampling during the summer of 2023. Data collected in 1977 and 1983 also indicated suitable oxythermal habitat. When adequate oxythermal habitat is available, Cisco are not squeezed into unfavorable, warmer water conditions and therefore do not experience higher levels of stress.

A temperature-dissolved oxygen profile was collected in the deepest basin on Brule Lake on August 24th, 2023, to evaluate the amount of cold, oxygenated water (i.e., oxythermal habitat) available to Cisco, also known as Tullibee. Based on the profile, the top of the thermocline (i.e., the location in the water column with the sharpest transition from warm to cold water) occurred at approximately 23 feet. Dissolved oxygen decreased to below 3.0 mg/L at 60.4 feet, which was below the thermocline, at the time of sampling. The temperature at which dissolved oxygen decreased to below 3.0 mg/L (i.e., TDO3, a single variable to characterize oxythermal habitat) was 8.8°C (47.8°F). TDO3 values cooler than 21.5°C indicate that oxythermal conditions are favorable for Cisco. Dissolved oxygen concentrations below the thermocline indicate that suitable oxythermal habitat for Cisco was available across a range of depths at the time of sampling during the summer of 2023. Data collected in 1977 and 1983 also indicated suitable oxythermal habitat. When adequate oxythermal habitat is available, Cisco are not squeezed into unfavorable, warmer water conditions and therefore do not experience higher levels of stress.

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

Minnesota DNR records list public access for Brule. Check the DNR LakeFinder page for the launch type and directions before you go.

Brule has a maximum depth of 78 feet and a mean depth of 35 feet, per Minnesota DNR data.

The most recent Minnesota DNR survey data for the main sport fish in Brule is from 2019.

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

No — Brule has no lake-specific regulations in the 2026 Minnesota DNR regulations, so statewide Minnesota limits apply. The statewide walleye and sauger limit is: 6 combined, not more than one walleye over 20". Verify current rules with the Minnesota DNR before keeping fish.