Two Inlets Lake

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

Minnesota · Minnesota Department of Natural Resources (DNR) · DOW 03001700

DNR records show 7 stocking entries at Two Inlets Lake since 2017, most recently walleye yearlings in 2025 (451 fish).

• Two Inlets Lake has 7 DNR stocking records across 5 years (2017-2025): walleye (7).
• The most-stocked species by count is walleye: 15,755 fish on record.
• Maximum depth 60 ft, mean depth 23 ft; surface area 578 acres, 169 littoral acres, 7.3 miles of shoreline, per the DNR lake survey.
• Average water clarity (Secchi depth) 7.4 ft.
• Fish species DNR lists here: black crappie, bluegill, brown bullhead, greater redhorse, hybrid sunfish, largemouth bass, northern pike, pumpkinseed, rock bass, shorthead redhorse, tullibee (cisco), walleye, and 3 more.
• 1 public access on the DNR list.
• Most recent DNR fish survey: July 30, 2025 (targeted survey).
• Becker County, nearest town Two Inlets; DNR lake number (DOW) 03001700.

Depth map

Bathymetric contours from the Minnesota DNR lake survey mapped 1/1/1940 (topo map/drg); depths in feet. Simplified for the web; not for navigation.

Stocking history

Public accesses

DNR fish survey, 2025

Temperature and dissolved oxygen measurements were collected from the deepest basin in Two Inlets Lake on July 30th, 2025. This was done to evaluate the quantity and quality of cold, oxygenated water (i.e., oxythermal habitat) available to Cisco, also known as Tullibee, the most sensitive coldwater species present in this lake. Cisco require a layer of oxythermal habitat that contains water temperatures below 21.2 degrees C (70.2 degrees F) and dissolved oxygen concentrations above 3.0 mg/L. Based on data collected from the deepest basin (maximum sampled depth was 55.1 feet), the water temperature decreased to 21.2 degrees C (70.2 degrees F) at 13.6 feet and the dissolved oxygen concentration decreased to 3.0 mg/L at 14.2 feet at the time of sampling. This layer in the water column was 0.7 feet, indicating oxythermal habitat for Cisco was present but marginal. Further, the temperature at which dissolved oxygen decreased to 3.0 mg/L (i.e., TDO3, a single variable to characterize oxythermal habitat) was 20.6 degrees C (69.1 degrees F). TDO3 values cooler than 21.2 degrees C (70.2 degrees F) indicate that oxythermal conditions were marginal for Cisco at the time of the survey as the layer was confined to less than 3 feet of suitable habitat at the time of the survey. Data collected by the Minnesota Department of Natural Resources during the period of maximum oxythermal stress (July 26th to Aug 24th) in 4 years, between 2006-2021, indicated unsuitable oxythermal habitat in most years surveyed, with unfavorable conditions recored in 2006, 2011, 2016 when there was no suitable oxythermal habitat layer. When adequate oxythermal habitat is not available, Cisco are squeezed into unfavorable, warmer water conditions and experience higher levels of stress.

Minnesota DNR survey narrative, July 30, 2025.

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