Eunice Lake
Becker County, MinnesotaMesotrophic
Eunice Lake sits at the top of the Minnesota PCA grading rubric with an A, a mark reached by the cleanest lakes in Minnesota. Clarity, phosphorus, and chlorophyll-a all rate similarly, so there is no obvious single lever to pull on watershed management.
Mesotrophic conditions dominate at Eunice Lake: enough nutrients for a healthy fishery, not so much that algal blooms become a chronic problem. The lake bottoms out at 30 ft — a moderate depth that supports a warm-water fishery without the year-round cold refuge a deeper basin provides. The lake's 378 acres and 3.4 miles of shoreline put it in the mid-range bucket — large enough for varied use, small enough that watershed inputs reach the whole basin. Eunice Lake ranks 25 of 93 in Becker County — solidly in the upper half of the local distribution.
Eunice Lake is on the Minnesota infested-waters list for zebra mussels — boaters should follow clean-drain-dry protocols when moving gear to or from the lake. Walleye are documented at Eunice Lake, one of 17 fish species on record for the lake. A documented public access point at Eunice Lake makes the lake usable for shore fishing, paddle craft, and trailered boats. The grade is based on limited monitoring — fewer than three independent measurement years contribute, so future updates may shift the letter.
Source: EPA Water Quality Portal sampling records, Minnesota DNR LakeFinder, last sampled 2024-09-26. Grade methodology: LakeGrade methodology.
Swimming Safety
Excellent for swimming, crystal clear water with minimal algae
Water Quality Grade: A, Excellent
Good clarity, visible to about 13.1 ft. Phosphorus level: 13 µg/L. Trophic State Index: 41.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | 13.1 ft | B |
| Phosphorus | 13 µg/L | A |
| Chlorophyll-a (Algae) | No data | |
| Trophic State Index (TSI) | 41 | Mesotrophic |
Moderate nutrients, good water quality
Lake Details
| Characteristic | Value |
|---|---|
| Maximum Depth | 30 ft |
| Surface Area | 378.45 acres |
| Shoreline Length | 3.4 mi |
| Littoral Zone | 49% |
| Public Access | Yes |
Fish Species
Click a species to see all Minnesota and Wisconsin lakes where it is found.
→ Best fishing times for Eunice Lake (14-day solunar calendar)
→ Is it safe to eat fish from Eunice Lake? (mercury & PFAS guide)
→ Eunice Lake fishing regulations (limits, seasons, special rules)
Invasive Species
Water Quality Trend: ↓ Declining
Based on 5 years of monitoring data (2020-2025).
| Metric | Trend | Change/Year | Years |
|---|---|---|---|
| Water Clarity | ↓ Declining | -0.234 m/yr | 5 |
| Phosphorus | ↓ Declining | +0.5 µg/L/yr | 5 |
Ice Season
Historical ice data from Minnesota DNR (14 observations).
Estimated open water season: 214 days
| Earliest | Latest | |
|---|---|---|
| Ice-Out | 2012-03-23 (2012) | 2013-05-10 (2013) |
| Ice-In | 2002-11-12 (2002) | 2009-12-04 (2009) |
Most recent ice-out: 2013-05-10
Location
County Ranking
Ranked #25 of 93 lakes in Becker County
Nearby Lakes in Becker County
More Minnesota Lake Rankings
State Parks Near Eunice Lake
Other Grade A Lakes in Minnesota
Mesotrophic Lakes in Minnesota
DNR Fisheries Survey Summary
12 surveys on file from MN DNR Fisheries. Most recent: 2025-05-22 (Targeted Survey).
Top Species by Catch Rate
| Species | Avg CPUE | Avg Weight |
|---|---|---|
| BNS | 602.68 | — |
| Bluegill | 29.69 | 0.21 lb |
| Yellow Perch | 24.77 | 0.28 lb |
| BKF | 21.78 | — |
| IOD | 19.01 | — |
| Bluntnose Minnow | 17.60 | — |
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.
Bluegill
Yellow Perch
From the 2025-05-22 survey
Lake Eunice is a 325-acre, Class-31 lake located in Becker County eleven miles southwest of Detroit Lakes. Lake Eunice is positioned directly southeast of Maud Lake, separated by County Highway 22. The lake's shoreline is highly developed and extensive bulrush and emergent vegetation removal has occurred in the last…
DNR Reports & Resources
Minnesota DNR LakeFinder publishes lake survey, fish stocking, water access, and aquatic plant data for Eunice Lake. 4 reports on file.
- —Fisheries Lake Survey — EuniceFisheries Lake Survey · MN DNR LakeFinder
- —Aquatic Plant Report — Eunice (1183)Aquatic Plant Report · MN DNR LakeFinder
- —Fish Stocking History — EuniceFish Stocking History · MN DNR LakeFinder
- —Public Water Access Sites — EunicePublic Water Access Sites · MN DNR LakeFinder
Data Sources
Water quality data from the EPA Water Quality Portal
Grading methodology based on Metropolitan Council standards
Lake details from Minnesota DNR LakeFinder
Ice data from Minnesota DNR Climate
Most recent sample: 2024-09-26
Monitoring stations: 1