Girl Lake
Cass County, Minnesota, near Longville. DNR lake ID 11017400.
Girl Lake is a 428.2-acre lake in Cass County, Minnesota, near Longville. Its deepest point reaches 81 ft, and about 64% of the lake is shallower than 15 feet. Summer water clarity averages 16.4 feet in Minnesota Pollution Control Agency monitoring, which places it in the mesotrophic nutrient class. It is part of the Woman Lake Chain. The DNR lists it for Eurasian watermilfoil, zebra mussel. DNR surveys document walleye, northern pike, muskellunge, largemouth bass, smallmouth bass, black crappie.
Buying or selling on Girl Lake? Ask us what lakeshore here actually sells for, which stretches of shoreline buyers compete for, and what’s coming up before it’s listed.
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Quick facts
| DNR lake ID | 11017400 |
|---|---|
| County | Cass County, near Longville |
| Surface area | 428.2 acres |
| Maximum depth | 81 ft |
| Share under 15 ft | 64% |
| Water clarity (summer) | 16.4 ft through 2025 |
| Phosphorus (summer) | 13.5 µg/L |
| Algae, chlorophyll-a (summer) | 3.4 µg/L |
| Nutrient class | Mesotrophic |
| Clarity trend | Clearer (2016 to 2025) |
| Boating chain | Woman Lake Chain |
| Invasive species | Eurasian watermilfoil, zebra mussel |
| Public water accesses | 1 |
Water quality
Summer averages from Minnesota Pollution Control Agency monitoring through 2025: clarity 16.4 ft, phosphorus 13.5 µg/L, algae (chlorophyll-a) 3.4 µg/L. Using the Carlson trophic state index, Girl Lake rates as mesotrophic. Summer clarity trend 2016 to 2025: clearer.
Fishing on Girl Lake
The most recent DNR standard fish survey was in 2021 (5 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 | trap | 0.11 | 0.2 to 0.7 |
| Northern pike | trap | 0.56 | n/a |
| Yellow perch | trap | 1.44 | 0.5 to 2.7 |
| Black crappie | trap | 0.44 | 0.7 to 3.2 |
| Bluegill | trap | 11.11 | 5.6 to 42.3 |
| Largemouth bass | trap | 0.78 | 0.3 to 1.1 |
| Pumpkinseed | trap | 4.44 | 1.7 to 8.2 |
| Rock bass | trap | 1.0 | 0.6 to 2.5 |
| Hybrid sunfish | trap | 0.33 | n/a |
Largest fish measured in recent DNR samples: Muskellunge 34.0 in (2020), Largemouth bass 14.0 in (2021), Smallmouth bass 18.0 in (2020), Northern pike 24.0 in (2021), Walleye 20.0 in (2021).
Game and panfish documented since 2005: Walleye, Northern pike, Muskellunge, Largemouth bass, Smallmouth bass, Black crappie, Bluegill, Yellow perch, Pumpkinseed, Hybrid sunfish, Rock bass, Green sunfish, Tullibee (cisco), Burbot, Bowfin, White sucker, Yellow bullhead, Brown bullhead, Black bullhead.
Fishing regulations
- Northern pike 24 to 36 in must be released (one over 36 allowed). (Minnesota Rules 6264.0400, April 2026)
Regulations change. Confirm with the DNR before fishing.
Invasive species
On the Minnesota DNR infested waters list for: Eurasian watermilfoil (listed 2017), zebra mussel (listed 2021).
Public boat access
- Girl Lake: 1 concrete slab launch ramp, 1 dock, 9 trailer spaces. From the intersection of Hwy. 84 and County Rd. 5 in downtown Longville go west on County Rd 5 for 0.4 miles. Directions
DNR water access records (2023). Confirm current conditions with the DNR.
Woman Lake Chain
Navigable channels join Woman, Girl, and Child lakes, and Longville is reachable by boat through Girl Lake. The DNR advises caution in the narrow channel between Woman and Child.
Woman Lake, Child Lake, Little Woman Lake
Nearby lakes
- Boxell Lake 1.4 mi, Cass County
- Broadwater Bay 1.5 mi, Cass County
- Carnahan Lake 1.8 mi, Cass County
- Cooper Lake 2.0 mi, Cass County
- Shurd Lake 2.0 mi, Cass County
- Hazel Lake 2.9 mi, Cass County
- Maple Lake 3.0 mi, Cass County
- Kego Lake 3.1 mi, Cass County
Questions about Girl Lake
How deep is Girl Lake?
Girl Lake reaches a maximum depth of 81 ft according to Minnesota DNR records. About 64% of the lake is shallower than 15 feet.
How big is Girl Lake?
Girl Lake covers about 428.2 acres in Cass County, Minnesota.
How clear is Girl Lake?
Summer water clarity on Girl Lake averages 16.4 feet (Secchi depth) in MPCA monitoring through 2025. Its trophic state is mesotrophic.
Does Girl Lake have zebra mussels or other invasive species?
The Minnesota DNR infested waters list includes Girl Lake for Eurasian watermilfoil, zebra mussel.
What fish are in Girl Lake?
Minnesota DNR surveys document walleye, northern pike, muskellunge, largemouth bass, smallmouth bass, black crappie, bluegill, yellow perch, pumpkinseed, hybrid sunfish in Girl Lake. The most recent standard survey was in 2021.
Where is the public boat access on Girl Lake?
Girl Lake has 1 public water access site on DNR record: Girl Lake.
How is the walleye population on Girl Lake?
In Minnesota DNR net surveys from 1997 to 2020, walleye numbers on Girl Lake ran mostly within 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 Girl Lake?
Homes on Girl 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 Girl Lake and nearby lakes, including off-market opportunities when available.
What is it like to live on Girl Lake?
A mid-size lake with room for boating and fishing, about 64% shallow shoreline under 15 feet, and summer clarity around 16.4 feet. Conditions vary by property, so walk the frontage and ask us what similar homes have sold for.
Are there special fishing regulations on Girl Lake?
Yes. Northern pike 24 to 36 in must be released (one over 36 allowed).
Ask us about Girl 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 2021), 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.