Rivalry Lake
Rivalry Lake in Lake County, Minnesota is not rated for water quality — its monitoring record does not meet the evidence bar. Water clarity: 10 ft visibility. Maximum depth: 100 ft. Surface area: 153.32 acres.
- Clarity
- 10 ft
- Max depth
- 100 ft
- Area
- 153 acres
- Trend
- → Stable
- Public access
- No
Next lake in Lake County
Why Rivalry Lake has no grade
We grade a lake only when its monitoring record clears the evidence bar: at least three phosphorus or chlorophyll-a samples in the last ten years, scored against EPA National Lakes Assessment thresholds for this lake’s ecoregion. For Rivalry Lake, no nutrient or algae measurement meets the evidence bar (at least 3 samples within 10 years). Sampling here has recorded water clarity, but not phosphorus and algae (chlorophyll-a).
Not Rated is not an F. It is EPA Integrated Reporting Category 3 — insufficient information. The water here may be excellent or poor; nobody has measured enough of it to say. Everything below that has been measured is still reported on this page.
Sampling is run by MPCA and volunteer programs, and published through the EPA Water Quality Portal. Read the full grading methodology.
Rivalry Lake is a 153-acre lake in Lake County, Minnesota with a maximum depth of 100 feet. The lake supports 7 documented fish species including burbot, cisco species, and lake trout. No public access — the lake is private or restricted.
Source: EPA Water Quality Portal sampling records, Minnesota DNR LakeFinder, last sampled 2023-06-08. Grade methodology: LakeGrade methodology.
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Swimming Safety
Not ratedLimited data
Not rated for swimming — there is not enough monitoring data to judge this lake
Water quality measurements for Rivalry Lake
These readings exist but do not meet the evidence bar for an A–F grade — see why.
Good clarity, visible to about 10 ft. Trophic State Index: 44.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | 10 ft | Not graded |
| Phosphorus | No recent samples | |
| Chlorophyll-a (Algae) | No recent samples | |
| Trophic State Index (TSI) | 44 | Mesotrophic |
Moderate nutrients, good water quality
Where to stay near Rivalry Lake
Compare lakeside cabins, hotels, and vacation rentals near Rivalry Lake in Lake County, Minnesota — live availability and prices for your trip. Switch the map to Satellite to see the lake and how close each stay is to the water.
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Lake Details
| Characteristic | Value |
|---|---|
| Maximum Depth | 100 ft |
| Surface Area | 153 acres |
| Shoreline Length | 4.3 mi |
| Littoral Zone | 22% |
| Public Access | No |
Fish Species
Click a species to see every graded lake where it is documented.
Fishing Rivalry Lake
DNR Fisheries Survey Summary
4 surveys on file from MN DNR Fisheries. Most recent: 2025-08-01 (Targeted Survey).
Top Species by Catch Rate
| Species | Avg CPUE | Avg Weight |
|---|---|---|
| CIS | 6.88 | 1.07 lb |
| Walleye | 5.25 | 2.46 lb |
| White Sucker | 2.88 | 2.48 lb |
| Tullibee (Cisco) | 2.75 | 0.56 lb |
| Lake Trout | 1.25 | 1.73 lb |
| BUB | 0.58 | 0.64 lb |
CPUE = catch per unit effort, averaged across surveys (excludes juvenile shoreline seining). Higher CPUE = more abundant in standardized sampling.
Length Distributions
Number of fish caught at each inch class in the most recent survey that recorded lengths. Red dashed line marks an approximate trophy threshold for that species.
CIS
Walleye
White Sucker
Lake Trout
From the 2025-08-01 survey
Temperature and dissolved oxygen measurements were collected from the deepest basin in Cherry Lake on August 1st, 2025. This was done to evaluate the quantity and quality of cold, oxygenated water (i.e., oxythermal habitat) available to Lake Trout, the most sensitive coldwater species present in this lake (Cisco, also…
DNR Reports & Resources
Minnesota DNR LakeFinder publishes lake survey, fish stocking, water access, and aquatic plant data for Rivalry Lake. 1 report on file.
These links open on the official state DNR websites (Wisconsin DNR survey PDFs · Minnesota DNR LakeFinder).
- —Fisheries Lake Survey — CherryFisheries Lake Survey · MN DNR LakeFinder
Water Quality Trend: → Stable
Based on 5 years of monitoring data (2020-2025).
| Metric | Trend | Change/Year | Years |
|---|---|---|---|
| Water Clarity | → Stable | -0.02 m/yr | 5 |
EPA Impairment Status
Rivalry Lake is officially listed as impaired under Clean Water Act §303(d) in the 2024 EPA reporting cycle (IR category 5).
Causes of impairment
Source: EPA ATTAINS assessment unit MN38-0166-00 · Official waterbody report · Matched by proximity (1.61 km)
Nearby Lakes in Lake County
Frequently asked questions about Rivalry Lake
What is the water quality grade for Rivalry Lake?
- Rivalry Lake in Lake County, Minnesota is not rated for water quality — its monitoring record does not meet the evidence bar. Water clarity: 10 ft visibility. Maximum depth: 100 ft. Surface area: 153.32 acres.
Is Rivalry Lake safe to swim in?
- Not rated for swimming — there is not enough monitoring data to judge this lake. Rivalry Lake is not rated for water quality — its monitoring record does not meet the evidence bar. Always check local health department advisories before swimming.
How deep is Rivalry Lake?
- Rivalry Lake has a maximum depth of 100 feet. The lake covers 153.32 acres.
What fish are in Rivalry Lake?
- Fish species found in Rivalry Lake include burbot, cisco species, lake trout, smallmouth bass, walleye, white sucker, yellow perch. Rivalry Lake is located in Lake County, Minnesota.
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Where this data comes from
1 measurement from 1 monitoring station, 2023. Retrieved from the EPA Water Quality Portal on 2026-08-02.
Collected and reported by
- Minnesota Pollution Control Agency - Ambient Surface Water
MNPCA1 sample · 2023
Analytical methods
- Field measurement/observation, generic method
Monitoring station identifiers (1)
Grade thresholds from the EPA National Lakes Assessment (EPA 841-R-24-006, Table 6-3), applied by ecoregion. See how grades are calculated and data sources.
Other records on this page
Impairment status from EPA ATTAINS 303(d) database
Lake size & watershed from HydroLAKES (HydroSHEDS)
Lake details from Minnesota DNR LakeFinder