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Long Lake (Aitkin County)

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

Minnesota · Minnesota Department of Natural Resources (DNR) · DOW 01008900

DNR records show 18 stocking entries at Long Lake (Aitkin County) since 2016, most recently walleye yearlings in 2025 (641 fish).

Long Lake (Aitkin County) has 18 DNR stocking records across 10 years (2016-2025): walleye (13), splake (5).
The most-stocked species by count is walleye: 44,918 fish on record.
Maximum depth 116 ft, mean depth 30 ft; surface area 435 acres, 120 littoral acres, 5.5 miles of shoreline, per the DNR lake survey.
Average water clarity (Secchi depth) 11.9 ft.
Fish species DNR lists here: black bullhead, black crappie, bluegill, bowfin (dogfish), brown bullhead, hybrid sunfish, largemouth bass, northern pike, pumpkinseed, rock bass, splake, tullibee (cisco), and 4 more.
1 public access on the DNR list.
Most recent DNR fish survey: August 4, 2025 (targeted survey).
Aitkin County, nearest town Glen; DNR lake number (DOW) 01008900.

Depth map

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Bathymetric contours from the Minnesota DNR lake survey mapped 9/14/1994 (orig map); depths in feet. Simplified for the web; not for navigation.

Stocking history

Year	Species	Size	Number	Pounds
2025	Walleye	yearlings	641	67.5
2025	Walleye²	fingerlings	2,960	105.7
2024	Walleye²	fingerlings	5,098	299.9
2023	Walleye²	fingerlings	6,490	299.6
2022	Splake	fingerlings	10,000	358.4
2022	Splake	yearlings	455	77.9
2022	Walleye²	fingerlings	5,026	300.0
2021	Walleye²	fingerlings	4,860	300.0
2020	Splake	fingerlings	10,869	616.9
2020	Walleye²	fingerlings	3,080	200.0
2019	Splake	yearlings	2,000	426.4
2019	Walleye²	fingerlings	7,140	300.0
2018	Splake	fingerlings	10,000	613.5
2018	Walleye²	fingerlings	4,455	297.0
2017	Walleye²	fingerlings	4,500	300.0
2016	Walleye	adults	220	220.0
2016	Walleye	fingerlings	274	16.0
2016	Walleye	yearlings	174	64.0

² fish purchased by the DNR for stocking.

Field note · Minnesota stocks by year, not by truck day: walleye fry go in within weeks of ice-out, fingerlings and yearlings mostly in fall, and stream trout in spring and fall. A row here means the fish went in during that year; DNR adds the year's rows after the fact, so the current year can look empty until winter.

Public accesses

Type	Owner	Where
concrete ramp	Minnesota DNR	- THE PUBLIC ACCESS IS LOCATED AT THE NORTH END OF THE LAKE.

DNR fish survey, 2025

A temperature-dissolved oxygen (TDO) profile was collected on 8/4/2025, to measure the amount of thermal habitat available for Tullibee. Adequate oxy-thermal habitat for Tullibee survival was observed from a depth of 13 feet to approximately 106 feet. In some years, a TDO3 (temperature at 3 mg/l dissolved oxygen) value cannot be calculated as the dissolved oxygen does not fall below 3ppm. This year the TDO3 was calculated at 18.5, 9.0, and 5.6 degrees C across multiple depths. TDO data indicates sufficient Tullibee habitat in each year since monitoring began (2007), although a significant summer kill was observed in 2009 when the poorest TDO values were observed as water temperatures peaked in mid-September. The lake provides "good" habitat compared to other lakes in the Aitkin management area that are monitored for Tullibee habitat. Because the management area is located near the southern edge of Minnesota's Tullibee range, TDO profiles should continue to be recorded to monitor the availability of cold-water habitat.

Minnesota DNR survey narrative, August 4, 2025.

All Minnesota stockings · every Minnesota lake with a page · state CSV · this lake on DNR LakeFinder

Stocking rows, depths, accesses and survey figures are Minnesota DNR LakeFinder data as of 2026-09-02; contours are the DNR bathymetric survey. Regulations, slot limits and special rules are on the DNR page linked above, not here.

Long Lake (Aitkin County)

Depth map

Stocking history

Public accesses

DNR fish survey, 2025

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