Newton Lake

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

Minnesota · Minnesota Department of Natural Resources (DNR) · DOW 38078400

Newton Lake has no DNR stocking rows in LakeFinder; this page carries its DNR depth, access and survey data.

• Newton Lake shows no stocking records in Minnesota DNR LakeFinder as of September 2, 2026.
• Maximum depth 47 ft; surface area 516 acres, 358 littoral acres, 12.1 miles of shoreline, per the DNR lake survey.
• Average water clarity (Secchi depth) 5.0 ft.
• Fish species DNR lists here: black crappie, northern pike, rock bass, shorthead redhorse, smallmouth bass, walleye, white sucker, yellow perch.
• 2 public accesses on the DNR list.
• Most recent DNR fish survey: August 8, 2025 (targeted survey).
• Lake County, nearest town Ely; DNR lake number (DOW) 38078400.

Depth map

Bathymetric contours from the Minnesota DNR lake survey; depths in feet. Simplified for the web; not for navigation.

Public accesses

DNR fish survey, 2025

Temperature and dissolved oxygen measurements were collected from the deepest basin in Newton Lake on August 8th, 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 45.9 feet), the water temperature never decreased to 21.2 degrees C (70.2 degrees F) and the dissolved oxygen concentration stayed greater than 3.0 mg/L for the entire sampled depth. Therefore, the water column did not contain a layer of water with sufficient temperature and dissolved oxygen for Cisco. Further, the temperature at which dissolved oxygen decreased to 3.0 mg/L (i.e., TDO3, a single variable to characterize oxythermal habitat) was never reached because dissolved oxygen remained above 3.0 mg/L throughout the sampled depths. In this case, the minimum temperature, 23.2 degrees C (73.8 degrees F), was substituted as TDO3. TDO3 values warmer than 21.2 degrees C (70.2 degrees F) indicate that oxythermal conditions were unsuitable for Cisco 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 2007, 2018, 2024 indicated unsuitable oxythermal habitat in most years surveyed, with unfavorable conditions recored in 2018, 2024 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. Across ten fisheries surveys spanning the period of 1966-2018, Cisco catches have fluctuated and in 2024 no Ciscos were caught.

Minnesota DNR survey narrative, August 8, 2025.

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