Floyd Lake
Floyd Lake in Becker County, Minnesota has a water quality grade of A (Excellent). Water clarity: 13.1 ft visibility. Phosphorus: 12 µg/L. Chlorophyll-a (algae): 3.6 µg/L. Maximum depth: 34 ft. Surface area: 1177.84 acres.
- Clarity
- 13.1 ft
- Typical in August
- 72°F
- Max depth
- 34 ft
- Area
- 1,178 acres
- Type
- Mesotrophic
- Trend
- ↑ Improving
- Public access
- Yes
- Ice-out
- Apr 24
- Open water
- 214 days
Next lake in Becker County
Free interactive depth-contour map of Floyd Lake, reaching a maximum surveyed depth of 30 ft. Toggle Depth contours to overlay the bathymetric survey lines. Contour data from Minnesota DNR.
Floyd Lake is a 1,178-acre mesotrophic lake in Becker County, Minnesota with a maximum depth of 34 feet. Water quality is graded A based on 2 sampling years through 2025. Overall water quality is improving over recent sampling years. The lake supports 16 documented fish species including black bullhead, black crappie, and bluegill. Public access is available with 1 public boat landing. Compared to the 83 other monitored lakes in Becker County, Floyd Lake ranks #21 for water quality.
Source: EPA Water Quality Portal sampling records, Minnesota DNR LakeFinder, last sampled 2025-09-26. Grade methodology: LakeGrade methodology.
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Swimming Safety
Grade onlyLow algae
Based on clarity and algae grades from past sampling — we do not hold live water temperature and a current cyanobacteria reading for this lake. Check your state or county health department before you swim.
Excellent for swimming, crystal clear water with minimal algae
Water Quality Grade: A (Excellent)
Good clarity, visible to about 13.1 ft. Phosphorus level: 12 µg/L. Chlorophyll-a: 3.6 µg/L. Trophic State Index: 41.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | 13.1 ft | Not graded |
| Phosphorus | 12 µg/L | Good |
| Chlorophyll-a (Algae) | 3.6 µg/L | Good |
| Trophic State Index (TSI) | 41 | Mesotrophic |
Moderate nutrients, good water quality
Where to stay near Floyd Lake
Compare lakeside cabins, hotels, and vacation rentals near Floyd Lake in Becker 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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Water Temperature
Floyd Lake typically sits around 72°F at the surface in August. Summer average is about 71°F. Usually warmest in Jul (about 73°F) and coldest in Apr (about 48°F). These are typical values by month — not a live reading.
Typical surface water temperature by month, from 640 field readings (2016–2025) via the EPA Water Quality Portal.
Lake Details
| Characteristic | Value |
|---|---|
| Maximum Depth | 34 ft |
| Surface Area | 1,178 acres |
| Shoreline Length | 9.7 mi |
| Littoral Zone | 73% |
| Public Access | Yes |
Lake Size & Watershed
Size, shoreline, and watershed area from HydroLAKES (HydroSHEDS).
Recreation & Access
- Floyd LakePublic
Fish Species
Click a species to see every graded lake where it is documented.
Fishing Floyd Lake
Invasive & Introduced Species
Red chips are ecologically harmful invasive species. Gray chips are stocked or introduced fish that aren't a current ecological concern.
DNR Fisheries Survey Summary
12 surveys on file from MN DNR Fisheries. Most recent: 2021-06-21 (Standard Survey).
Top Species by Catch Rate
| Species | Avg CPUE | Avg Weight |
|---|---|---|
| BNS | 217.31 | — |
| Bluntnose Minnow | 82.96 | — |
| Fathead Minnow | 66.65 | — |
| MMS | 49.09 | — |
| BKF | 38.26 | — |
| Bluegill | 27.16 | 0.2 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
From the 2021-06-21 survey
Floyd (a.k.a., Big Floyd) Lake is a 1,212-acre lake located in Becker County two miles north of the city of Detroit Lakes. Floyd Lake's shoreline is heavily developed, and the lake receives a high amount of angling pressure and recreational use. Floyd Lake consists of two basins, the shallow larger main basin and the…
DNR Reports & Resources
Minnesota DNR LakeFinder publishes lake survey, fish stocking, water access, and aquatic plant data for Floyd Lake. 3 reports on file.
These links open on the official state DNR websites (Wisconsin DNR survey PDFs · Minnesota DNR LakeFinder).
- —Fisheries Lake Survey — FloydFisheries Lake Survey · MN DNR LakeFinder
- —Fish Stocking History — FloydFish Stocking History · MN DNR LakeFinder
- —Public Water Access Sites — FloydPublic Water Access Sites · MN DNR LakeFinder
Water Quality Trend: ↑ Improving
Based on 6 years of monitoring data (2020-2025).
| Metric | Trend | Change/Year | Years |
|---|---|---|---|
| Water Clarity | ↑ Improving | +0.092 m/yr | 6 |
| Phosphorus | → Stable | +0.37 µg/L/yr | 6 |
| Chlorophyll-a | ↑ Improving | -0.3 µg/L/yr | 6 |
Ice Season
Historical ice data from Minnesota DNR (33 observations).
Estimated open water season: 214 days
| Earliest | Latest | |
|---|---|---|
| Ice-Out | 2012-03-24 (2012) | 2013-05-12 (2013) |
| Ice-In | 2019-11-07 (2019) | 2009-12-05 (2009) |
Most recent ice-out: 2025-04-07
EPA Impairment Status
Floyd Lake is officially listed as impaired under Clean Water Act §303(d) in the 2024 EPA reporting cycle (IR category 4A).
Causes of impairment
A Total Maximum Daily Load (TMDL) plan has been approved.
Source: EPA ATTAINS assessment unit MN03-0387-02 · Official waterbody report · Matched by proximity (0.9 km)
County Ranking
Ranked #21 of 84 lakes in Becker County
Nearby Lakes in Becker County
Frequently asked questions about Floyd Lake
What is the water quality grade for Floyd Lake?
- Floyd Lake in Becker County, Minnesota has a water quality grade of A (Excellent). Water clarity: 13.1 ft visibility. Phosphorus: 12 µg/L. Chlorophyll-a (algae): 3.6 µg/L. Maximum depth: 34 ft. Surface area: 1177.84 acres.
Is Floyd Lake safe to swim in?
- Excellent for swimming, crystal clear water with minimal algae. Floyd Lake has a water quality grade of A (Excellent). Algae concentration (chlorophyll-a) is 3.6 µg/L. Always check local health department advisories before swimming.
What is the water temperature of Floyd Lake?
- Floyd Lake typically sits around 72°F at the surface in August, from 640 EPA Water Quality Portal field readings (2016–2025). That is a typical value for the month, not a live reading.
How deep is Floyd Lake?
- Floyd Lake has a maximum depth of 34 feet. The lake covers 1177.84 acres.
What fish are in Floyd Lake?
- Fish species found in Floyd Lake include black bullhead, black crappie, bluegill, bowfin (dogfish), brown bullhead, green sunfish, hybrid sunfish, largemouth bass, northern pike, pumpkinseed, rock bass, sunfish, walleye, white sucker, yellow bullhead, yellow perch. Floyd Lake is located in Becker County, Minnesota.
When does Floyd Lake thaw?
- Floyd Lake typically has ice-out around Apr 24. Ice typically forms around Nov 24. The open water season is approximately 214 days.
Are there boat ramps on Floyd Lake?
- Floyd Lake has 1 documented boat landing in the USGS National Boat Ramps inventory. Named access points include Floyd Lake. Public access is listed as yes.
Explore Floyd Lake across LakeGrade
Depth, room, public access, and the state wake-sport rules
Fish species and top-graded lakes across Minnesota
Fish species and best lakes in Becker County
Species activity outlook by water temperature and season
Top lakes and where to stay in the Detroit Lakes Area area
Top lakes and where to stay in the Park Rapids Area area
Where to stay at Minnesota's top lakes, each with its grade
Lakes in the Red River of the North Watershed, ranked by water quality
Moderate nutrients, good water quality
Minnesota's cleanest and most-polluted lakes, ranked
More Minnesota Lake Rankings
State Parks Near Floyd Lake
Other Grade A Lakes in Minnesota
Mesotrophic Lakes in Minnesota
Compare Floyd Lake With Nearby Lakes
Where this data comes from
215 measurements from 1 monitoring station, 2020–2025. Retrieved from the EPA Water Quality Portal on 2026-08-02.
Collected and reported by
- Minnesota Pollution Control Agency - Ambient Surface Water
MNPCA215 samples · 2020–2025
Analytical methods
- Field measurement/observation, generic method
- Phosphorus by Two Reagent Colorimetry
- 10200 H ~ Chlorophyll a-b-c Determination
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
Named boat-access points from the USGS National Boat Ramps inventory
Ice data from Minnesota DNR Climate