Broadwater Bay
Cass County, Minnesota. DNR lake ID 11020101.
Broadwater Bay is a lake in Cass County, Minnesota. Summer water clarity averages 13.7 feet in Minnesota Pollution Control Agency monitoring, which places it in the mesotrophic nutrient class. It is not on the DNR infested waters list as of September 2026.
Buying or selling on Broadwater Bay? 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 | 11020101 |
|---|---|
| County | Cass County |
| Maximum depth | Not surveyed |
| Share under 15 ft | Not surveyed |
| Water clarity (summer) | 13.7 ft through 2025 |
| Phosphorus (summer) | 14.5 µg/L |
| Algae, chlorophyll-a (summer) | 4.6 µg/L |
| Nutrient class | Mesotrophic |
| Clarity trend | Clearer (2016 to 2025) |
| Invasive species | Not on DNR infested waters list (Sept 2026) |
| Public water accesses | 2 |
Water quality
Summer averages from Minnesota Pollution Control Agency monitoring through 2025: clarity 13.7 ft, phosphorus 14.5 µg/L, algae (chlorophyll-a) 4.6 µg/L. Using the Carlson trophic state index, Broadwater Bay rates as mesotrophic. Summer clarity trend 2016 to 2025: clearer.
Fishing on Broadwater Bay
The most recent DNR standard fish survey was in 1986 (40 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 | 4.29 | 4.0 to 9.6 |
| Walleye | trap | 0.4 | 0.3 to 0.9 |
| Northern pike | gill | 12.71 | 3.0 to 7.9 |
| Northern pike | trap | 0.6 | n/a |
| Yellow perch | gill | 28.14 | 7.1 to 33.9 |
| Yellow perch | trap | 1.9 | 0.7 to 3.7 |
| Black crappie | gill | 0.14 | 0.2 to 1.1 |
| Black crappie | trap | 0.9 | 0.3 to 1.7 |
| Bluegill | gill | 12.71 | n/a |
| Bluegill | trap | 53.3 | 3.7 to 42.9 |
| Largemouth bass | gill | 0.14 | 0.3 to 1.2 |
| Largemouth bass | trap | 0.9 | 0.4 to 1.4 |
| Smallmouth bass | trap | 0.1 | 0.1 to 0.6 |
| Tullibee (cisco) | gill | 1.86 | 0.5 to 5.2 |
| Pumpkinseed | gill | 3.71 | n/a |
| Pumpkinseed | trap | 9.4 | 1.6 to 6.9 |
| Rock bass | gill | 2.71 | 1.0 to 6.6 |
| Rock bass | trap | 3.7 | 0.7 to 3.3 |
| Hybrid sunfish | gill | 0.29 | n/a |
| Burbot | gill | 0.14 | 0.1 to 0.2 |
Walleye catch was within the typical range for similar lakes in that survey.
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
No public water access on DNR record.
Nearby lakes
- Carnahan Lake 0.9 mi, Cass County
- Girl Lake 1.5 mi, Cass County
- Hazel Lake 1.8 mi, Cass County
- Woman Lake 1.9 mi, Cass County
- Primer Lake 2.1 mi, Cass County
- Silver Lake 2.2 mi, Cass County
- Boxell Lake 2.4 mi, Cass County
- Shurd Lake 2.9 mi, Cass County
Questions about Broadwater Bay
How clear is Broadwater Bay?
Summer water clarity on Broadwater Bay averages 13.7 feet (Secchi depth) in MPCA monitoring through 2025. Its trophic state is mesotrophic.
Does Broadwater Bay have zebra mussels or other invasive species?
Broadwater Bay 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.
Are there lake homes for sale on Broadwater Bay?
Homes on Broadwater Bay 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 Broadwater Bay and nearby lakes, including off-market opportunities when available.
What is it like to live on Broadwater Bay?
Small, quiet water suited to paddling and fishing, and summer clarity around 13.7 feet. Conditions vary by property, so walk the frontage and ask us what similar homes have sold for.
Are there special fishing regulations on Broadwater Bay?
No lake-specific regulation was found for Broadwater Bay in Minnesota Rules or the DNR sunfish list. Statewide and zone regulations apply.
Ask us about Broadwater Bay
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 1986), 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.