Toad Lake
Becker County, MinnesotaEutrophic
Toad Lake carries a solid B grade — strong on most parameters, with measurements that hold up well across the summer season. The three sub-grades — clarity, phosphorus, and chlorophyll-a — track close together, so no single parameter is dragging the average.
At a TSI of 50, Toad Lake reads as eutrophic — nutrient-rich enough that summer algal growth and reduced clarity are expected, not unusual. Toad Lake reaches 29 ft at its deepest point — typical for Minnesota mid-sized lakes, with seasonal stratification but limited cold-water refuge. At 1,715 acres, Toad Lake is one of the larger lakes in Becker County, with 10.2 miles of shoreline supporting multiple distinct use patterns. Toad Lake sits at rank 59 of 93 in Becker County, in the lower half of the local distribution.
Zebra mussels have been documented at Toad Lake, which alters the filter-feeding balance and can paradoxically increase water clarity while disrupting the food web. The fishery includes walleye alongside the lake's other 15 documented species — a notable draw for Minnesota anglers. A documented public access point at Toad Lake makes the lake usable for shore fishing, paddle craft, and trailered boats. The lake has a partial ice record — 14 observed ice-outs, centered near Apr 25. Monitoring depth is thin here: the LakeGrade rubric is applied to a small number of sample years, and the grade will be revised as more data accumulates.
Source: EPA Water Quality Portal sampling records, Minnesota DNR LakeFinder, last sampled 2024-09-16. Grade methodology: LakeGrade methodology.
Swimming Safety
Good for swimming, clear water with low algae levels
Water Quality Grade: B, Good
Moderate clarity, visible to about 7 ft. Phosphorus level: 27 µg/L. Trophic State Index: 50.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | 7 ft | C |
| Phosphorus | 27 µg/L | B |
| Chlorophyll-a (Algae) | No data | |
| Trophic State Index (TSI) | 50 | Eutrophic |
High nutrients, frequent algae, reduced clarity
Lake Details
| Characteristic | Value |
|---|---|
| Maximum Depth | 29 ft |
| Average Depth | 21 ft |
| Surface Area | 1.7K acres |
| Shoreline Length | 10.2 mi |
| Littoral Zone | 33% |
| Public Access | Yes |
Fish Species
Click a species to see all Minnesota and Wisconsin lakes where it is found.
→ Best fishing times for Toad Lake (14-day solunar calendar)
→ Is it safe to eat fish from Toad Lake? (mercury & PFAS guide)
→ Toad Lake fishing regulations (limits, seasons, special rules)
Invasive Species
Water Quality Trend: ↑ Improving
Based on 5 years of monitoring data (2020-2025).
| Metric | Trend | Change/Year | Years |
|---|---|---|---|
| Water Clarity | ↑ Improving | +0.13 m/yr | 5 |
| Phosphorus | → Stable | 0 µg/L/yr | 5 |
Ice Season
Historical ice data from Minnesota DNR (20 observations).
Estimated open water season: 203 days
| Earliest | Latest | |
|---|---|---|
| Ice-Out | 2012-03-23 (2012) | 2013-05-13 (2013) |
| Ice-In | 2003-11-08 (2003) | 2001-12-12 (2001) |
Most recent ice-out: 2021-04-05
Location
County Ranking
Ranked #59 of 93 lakes in Becker County
Nearby Lakes in Becker County
More Minnesota Lake Rankings
Other Grade B Lakes in Minnesota
Eutrophic Lakes in Minnesota
DNR Fisheries Survey Summary
12 surveys on file from MN DNR Fisheries. Most recent: 2021-08-09 (Standard Survey).
Top Species by Catch Rate
| Species | Avg CPUE | Avg Weight |
|---|---|---|
| MMS | 195.50 | — |
| CSH | 42.86 | — |
| Bluntnose Minnow | 29.98 | — |
| Bluegill | 25.41 | 0.17 lb |
| Yellow Bass | 10.76 | 0.78 lb |
| Yellow Perch | 10.05 | 0.13 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.
Bluegill
Yellow Bass
Yellow Perch
From the 2021-08-09 survey
Toad (also referred to as Big Toad) Lake is a 1,715-acre lake located in central Becker County, 21 miles east of the city of Detroit Lakes. The shoreline of the lake is moderately developed, primarily along its northern and southwestern shores. The Toad Lake Aquatic Management Area (AMA) protects 115.1 acres of land…
DNR Reports & Resources
Minnesota DNR LakeFinder publishes lake survey, fish stocking, water access, and aquatic plant data for Toad Lake. 4 reports on file.
- —Fisheries Lake Survey — ToadFisheries Lake Survey · MN DNR LakeFinder
- —Aquatic Plant Report — Toad (1000)Aquatic Plant Report · MN DNR LakeFinder
- —Fish Stocking History — ToadFish Stocking History · MN DNR LakeFinder
- —Public Water Access Sites — ToadPublic 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: 2024-09-16
Monitoring stations: 3