Marion Lake (Cass County)
Cass County, Minnesota - DNR stocking history, depth and survey data
Minnesota · Minnesota Department of Natural Resources (DNR) · DOW 11004600
DNR records show 13 stocking entries at Marion Lake (Cass County) since 2016, most recently brook trout yearlings in 2025 (660 fish).
- Marion Lake (Cass County) has 13 DNR stocking records across 10 years (2016-2025): brook trout (7), rainbow trout (6).
- The most-stocked species by count is brook trout: 4,620 fish on record.
- Maximum depth 60 ft; surface area 12 acres, 6 littoral acres, 0.6 miles of shoreline, per the DNR lake survey.
- Average water clarity (Secchi depth) 10.6 ft.
- 1 public access on the DNR list.
- Most recent DNR fish survey: (targeted survey).
- Cass County, nearest town Outing; DNR lake number (DOW) 11004600.
Stocking history
| Year | Species | Size | Number | Pounds |
|---|---|---|---|---|
| 2025 | Brook Trout | yearlings | 660 | 171.4 |
| 2025 | Rainbow Trout | yearlings | 800 | 296.3 |
| 2024 | Brook Trout | yearlings | 660 | 129.7 |
| 2024 | Rainbow Trout | yearlings | 513 | 159.3 |
| 2023 | Brook Trout | yearlings | 660 | 288.2 |
| 2023 | Rainbow Trout | yearlings | 514 | 125.1 |
| 2022 | Brook Trout | fingerlings | 660 | 66.0 |
| 2021 | Brook Trout | yearlings | 660 | 333.3 |
| 2020 | Brook Trout | yearlings | 660 | 942.9 |
| 2019 | Brook Trout | yearlings | 660 | 273.9 |
| 2018 | Rainbow Trout | yearlings | 462 | 169.8 |
| 2017 | Rainbow Trout | yearlings | 664 | 277.8 |
| 2016 | Rainbow Trout | yearlings | 317 | 26.9 |
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 |
|---|---|---|
| CA | Minnesota DNR | Limited parking at top of hill. |
DNR fish survey, 2022
Marion Lake is a designated stream trout lake that is managed for Brook Trout. The dissolved oxygen and temperature profiles were measured in August 2022 to monitor habitat for trout. Optimal thermal and oxygen conditions for Brook Trout (10-16°C [50-61°F] and greater than or equal to 5 ppm DO) were not present in August. The coolest water with DO > 5 ppm was 22.9°C (73°F) at a depth of 10 ft. Temperature at a dissolved oxygen concentration of 3 ppm (TDO3) was 21.2°C (70°F) in August. The oxythermal habitat measured in August 2022 was the worst for trout ever measured in Marion Lake in nearly annual monitoring since 2006 with occasional measurements prior to then. In most years Marion Lake has good late summer trout habitat, but some in years (2009, 2016) trout habitat is poor. Marion Lake will occasionally have low oxygen in the winter causing winterkill of trout. Marion is normally stocked with about 660 yearling Brook Trout each spring. Designated stream trout lakes have additional angling regulations. Be sure to consult the current Minnesota Fishing Regulations book for regulations, seasons, and possession limits before fishing designated trout waters.
Minnesota DNR survey narrative, .
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. Regulations, slot limits and special rules are on the DNR page linked above, not here.
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