Jack Lake
Cass County, Minnesota, near Walker. DNR lake ID 11040000.
Jack Lake is a 142-acre lake in Cass County, Minnesota, near Walker. Its deepest point reaches 110 ft, and about 31% of the lake is shallower than 15 feet. Summer water clarity averages 15.9 feet in Minnesota Pollution Control Agency monitoring, which places it in the oligotrophic nutrient class. It is not on the DNR infested waters list as of September 2026. DNR surveys document walleye, northern pike, largemouth bass, black crappie, bluegill, yellow perch.
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Quick facts
| DNR lake ID | 11040000 |
|---|---|
| County | Cass County, near Walker |
| Surface area | 142 acres |
| Maximum depth | 110 ft |
| Share under 15 ft | 31% |
| Water clarity (summer) | 15.9 ft through 2023 |
| Phosphorus (summer) | 7.4 µg/L |
| Algae, chlorophyll-a (summer) | 3.1 µg/L |
| Nutrient class | Oligotrophic |
| Invasive species | Not on DNR infested waters list (Sept 2026) |
| Public water accesses | 1 |
Water quality
Summer averages from Minnesota Pollution Control Agency monitoring through 2023: clarity 15.9 ft, phosphorus 7.4 µg/L, algae (chlorophyll-a) 3.1 µg/L. Using the Carlson trophic state index, Jack Lake rates as oligotrophic.
Fishing on Jack Lake
The most recent DNR standard fish survey was in 2018 (8 years ago). Catch per net is compared with the DNR’s typical range for lakes of the same type.
| Species | Net | Catch per net | Typical range |
|---|---|---|---|
| Walleye | gill | 0.17 | 1.0 to 5.0 |
| Northern pike | gill | 6.67 | 2.2 to 8.7 |
| Northern pike | trap | 0.22 | n/a |
| Yellow perch | trap | 1.11 | 0.4 to 2.3 |
| Black crappie | trap | 0.33 | 0.5 to 2.2 |
| Bluegill | trap | 25.22 | 7.7 to 43.4 |
| Largemouth bass | gill | 0.17 | 0.5 to 1.7 |
| Largemouth bass | trap | 0.33 | 0.4 to 1.5 |
| Tullibee (cisco) | gill | 2.17 | 1.3 to 10.4 |
| Pumpkinseed | trap | 2.11 | 1.4 to 5.9 |
| Rock bass | trap | 3.11 | 0.8 to 3.7 |
| Hybrid sunfish | trap | 0.56 | n/a |
Walleye catch was below the typical range for similar lakes in that survey.
Largest fish measured in recent DNR samples: Northern pike 29.0 in (2018), Largemouth bass 18.0 in (2018), Walleye 28.0 in (2018).
Game and panfish documented since 2005: Walleye, Northern pike, Largemouth bass, Black crappie, Bluegill, Yellow perch, Pumpkinseed, Hybrid sunfish, Rock bass, Tullibee (cisco), Burbot, Bowfin, Yellow bullhead, Brown bullhead.
Fishing regulations
No lake-specific regulation found in Minnesota Rules or the DNR sunfish list. Statewide and zone regulations apply.
Regulations change. Confirm with the DNR before fishing.
Invasive species
Not on the Minnesota DNR infested waters list as of September 2026. That means no confirmed listing, not a guarantee the lake is free of invasive species.
Public boat access
- Jack Lake: 1 natural launch ramp, 5 trailer spaces. South of Walker, 4.2 miles east of junction of Hwy 200 and 371 on Hwy 200 then north N 1 mile on forest road 2666. Directions
DNR water access records (2023). Confirm current conditions with the DNR.
Nearby lakes
- Deep Lake 1.6 mi, Cass County
- Hanson Lake 1.9 mi, Cass County
- Turtle Lake 2.3 mi, Cass County
- Big Hanson Lake 2.4 mi, Cass County
- Rat Lake 3.2 mi, Cass County
- Hovde Lake 3.4 mi, Cass County
- Rice Lake 3.9 mi, Cass County
- Pine Lake 3.9 mi, Cass County
Questions about Jack Lake
How deep is Jack Lake?
Jack Lake reaches a maximum depth of 110 ft according to Minnesota DNR records. About 31% of the lake is shallower than 15 feet.
How big is Jack Lake?
Jack Lake covers about 142 acres in Cass County, Minnesota.
How clear is Jack Lake?
Summer water clarity on Jack Lake averages 15.9 feet (Secchi depth) in MPCA monitoring through 2023. Its trophic state is oligotrophic.
Does Jack Lake have zebra mussels or other invasive species?
Jack Lake is not on the Minnesota DNR infested waters list as of September 2026. That means there is no confirmed listing; it is not a guarantee the lake is free of invasive species.
What fish are in Jack Lake?
Minnesota DNR surveys document walleye, northern pike, largemouth bass, black crappie, bluegill, yellow perch, pumpkinseed, hybrid sunfish, rock bass, tullibee (cisco) in Jack Lake. The most recent standard survey was in 2018.
Where is the public boat access on Jack Lake?
Jack Lake has 1 public water access site on DNR record: Jack Lake.
How is the walleye population on Jack Lake?
In Minnesota DNR net surveys from 2007 to 2018, walleye numbers on Jack Lake ran mostly below the typical range for similar lakes. Nets measure how many fish a lake holds, not where they’re biting, so local guides are the best source for current fishing.
Are there lake homes for sale on Jack Lake?
Homes on Jack Lake come up for sale throughout the year, and some sell before they’re ever publicly advertised. Tell us what you’re looking for and our agents will run a custom search and send you matching homes on Jack Lake and nearby lakes, including off-market opportunities when available.
What is it like to live on Jack Lake?
Small, quiet water suited to paddling and fishing, about 31% shallow shoreline under 15 feet, and summer clarity around 15.9 feet. Conditions vary by property, so walk the frontage and ask us what similar homes have sold for.
Are there special fishing regulations on Jack Lake?
No lake-specific regulation was found for Jack Lake in Minnesota Rules or the DNR sunfish list. Statewide and zone regulations apply.
Ask us about Jack Lake
Whether you’re buying, selling, or just curious, our team works Cass County lakes every day. Send us a note or call (218) 656-6469.
Sources: Minnesota DNR LakeFinder records, DNR fish surveys (latest 2018), DNR infested waters list (Sept 2026), Minnesota Rules 6264.0400 (April 2026), MPCA monitoring via the Water Quality Portal, DNR water access records (2023), LAGOS-US. Lakewide information from public data; it does not describe any specific property. Verify shoreline, bottom type, and depth at any frontage.