Johnson Lake (St. Louis County, DOW 69069100)

St. Louis County, Minnesota - DNR stocking history, depth and survey data

Minnesota · Minnesota Department of Natural Resources (DNR) · DOW 69069100

Johnson Lake (St. Louis County, DOW 69069100) has no DNR stocking rows in LakeFinder; this page carries its DNR depth, access and survey data.

• Johnson Lake (St. Louis County, DOW 69069100) shows no stocking records in Minnesota DNR LakeFinder as of September 2, 2026.
• Maximum depth 88 ft, mean depth 24 ft; surface area 1,736 acres, 557 littoral acres, 26.8 miles of shoreline, per the DNR lake survey.
• Average water clarity (Secchi depth) 10.9 ft.
• Fish species DNR lists here: cisco species, lake whitefish, northern pike, rock bass, smallmouth bass, walleye, white sucker, yellow perch.
• 1 public access on the DNR list.
• Most recent DNR fish survey: August 1, 2024 (targeted survey).
• St. Louis County, nearest town Crane Lake; DNR lake number (DOW) 69069100.

Depth map

Bathymetric contours from the Minnesota DNR lake survey mapped 8/26/1969 (orig map); depths in feet. Simplified for the web; not for navigation.

Public accesses

DNR fish survey, 2024

Temperature and dissolved oxygen measurements were collected in the deepest basin in Johnson Lake on August 1, 2024 to evaluate the quantity and quality of cold, oxygenated water (i.e., oxythermal habitat) available to Lake Whitefish the most sensitive coldwater species present in this lake (Cisco also present). During the summer, Lake Whitefish require a layer of oxythermal habitat that contains water temperatures below 17.2 degrees C (63.0 degrees F) and dissolved oxygen concentrations above 3.0 mg/L. Based on the profile from the deepest basin, the water temperature decreased to below 17.2 degrees C (63.0 degrees F) at 26.7 feet and the dissolved oxygen concentration decreased to 3.0 mg/L at 71 feet at the time of sampling. The thickness of this layer of water in the water column was 44.4 feet, indicating that oxythermal habitat was present for Lake Whitefish. Further, the temperature at which dissolved oxygen decreased to 3.0 mg/L (i.e., TDO3, a single variable to characterize oxythermal habitat) was 7.4 degrees C (45.3 degrees F). TDO3 values cooler than 17.2 degrees C (63.0 degrees F) indicate that oxythermal conditions were suitable for Lake Whitefish at the time of the survey. Data collected by the Minnesota Department of Natural Resources during the late summer period of maximum oxythermal stress in 2023, 2016, and 2014 also indicated suitable oxythermal habitat in all years. When inadequate oxythermal habitat is available, Lake Whitefish are squeezed into unfavorable, warmer water conditions and experience higher levels of stress.

Minnesota DNR survey narrative, August 1, 2024.

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