Martin Lake
Martin Lake in Anoka County, Minnesota has a water quality grade of D (Nutrient-rich). Water clarity: 2.5 ft visibility. Phosphorus: 55 µg/L. Chlorophyll-a (algae): 29.4 µg/L. Maximum depth: 20 ft. Surface area: 232.31 acres.
- Clarity
- 2.5 ft
- Typical in August
- 79°F
- Max depth
- 20 ft
- Area
- 232 acres
- Type
- Eutrophic
- Trend
- → Stable
- Public access
- Yes
- Ice-out
- Apr 8
- Open water
- 229 days
Grade D measures nutrients and algae, not whether this is a good place for a cabin trip. Cabins and rentals near Martin Lake →
Next lake in Anoka County
Martin Lake is a 232-acre productive, nutrient-rich eutrophic lake in Anoka County, Minnesota with a maximum depth of 20 feet. Water quality is graded D based on 2 sampling years through 2025. Phosphorus level is declining over recent sampling years. The lake supports 13 documented fish species including black bullhead, black crappie, and bluegill. Public access is available with 1 public boat landing. Compared to the 22 other monitored lakes in Anoka County, Martin Lake ranks #16 for water quality.
Source: EPA Water Quality Portal sampling records, Minnesota DNR LakeFinder, last sampled 2025-09-24. Grade methodology: LakeGrade methodology.
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Swimming Safety
Grade onlyAlgae risk
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.
Nutrients and algae run higher than average — check local advisories before swimming, and skip the water if you see scum
Water Quality Grade: D (Nutrient-rich)
Very murky, less than 2.5 ft of visibility. Phosphorus level: 55 µg/L. Chlorophyll-a: 29.4 µg/L. Trophic State Index: 63.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | 2.5 ft | Not graded |
| Phosphorus | 55 µg/L | Poor |
| Chlorophyll-a (Algae) | 29.4 µg/L | Poor |
| Trophic State Index (TSI) | 63 | Eutrophic |
High nutrients, frequent algae, reduced clarity
Where to stay near Martin Lake
Compare lakeside cabins, hotels, and vacation rentals near Martin Lake in Anoka 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. The water-quality grade measures nutrients and algae, not lodging — cabins and rentals around Martin Lake are listed below.
Top-rated places to stay near Martin Lake
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Planning a whole trip? See where to stay at Minnesota’s top lakes →
Water Temperature
Martin Lake typically sits around 79°F at the surface in August. Summer average is about 76°F. Usually warmest in Jul (about 80°F) and coldest in May (about 60°F). These are typical values by month — not a live reading.
Typical surface water temperature by month, from 144 field readings (2016–2025) via the EPA Water Quality Portal. See the full Martin Lake water temperature breakdown →
Lake Details
| Characteristic | Value |
|---|---|
| Maximum Depth | 20 ft |
| Surface Area | 232 acres |
| Shoreline Length | 3.2 mi |
| Littoral Zone | 60% |
| Public Access | Yes |
Lake Size & Watershed
Size, shoreline, and watershed area from HydroLAKES (HydroSHEDS).
Recreation & Access
- Martin LakePublic
Fish Species
Click a species to see every graded lake where it is documented.
Fishing Martin Lake
DNR Fisheries Survey Summary
12 surveys on file from MN DNR Fisheries. Most recent: 2024-07-01 (Targeted Survey).
Top Species by Catch Rate
| Species | Avg CPUE | Avg Weight |
|---|---|---|
| Black Bullhead | 46.96 | 0.43 lb |
| White Crappie | 21.17 | 0.24 lb |
| Bluegill | 20.56 | 0.2 lb |
| Black Crappie | 11.57 | 0.23 lb |
| Yellow Perch | 3.65 | 0.15 lb |
| Common Carp | 2.85 | 3.97 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.
Black Bullhead
White Crappie
Bluegill
Black Crappie
From the 2024-07-01 survey
Martin Lake is a 232-acre, class 24 lake located in northern Anoka County, about 5 miles west of the town of Wyoming. The lake has 140 littoral acres, and a maximum depth of 20 feet. The primary management species is Walleye, and the secondary management species are Bluegill and Black Crappie. To prevent winter kills,…
DNR Reports & Resources
Minnesota DNR LakeFinder publishes lake survey, fish stocking, water access, and aquatic plant data for Martin Lake. 3 reports on file.
These links open on the official state DNR websites (Wisconsin DNR survey PDFs · Minnesota DNR LakeFinder).
- —Fisheries Lake Survey — MartinFisheries Lake Survey · MN DNR LakeFinder
- —Fish Stocking History — MartinFish Stocking History · MN DNR LakeFinder
- —Public Water Access Sites — MartinPublic Water Access Sites · MN DNR LakeFinder
Water Quality Trend: → Stable
Based on 6 years of monitoring data (2020-2025).
| Metric | Trend | Change/Year | Years |
|---|---|---|---|
| Water Clarity | → Stable | -0.008 m/yr | 6 |
| Phosphorus | ↓ Declining | +2.34 µg/L/yr | 5 |
| Chlorophyll-a | ↑ Improving | -1.42 µg/L/yr | 5 |
Ice Season
Historical ice data from Minnesota DNR (59 observations).
Estimated open water season: 229 days
| Earliest | Latest | |
|---|---|---|
| Ice-Out | 2016-03-16 (2016) | 2008-04-23 (2008) |
| Ice-In | 1991-11-04 (1991) | 2001-12-20 (2001) |
Most recent ice-out: 2022-04-15
EPA Impairment Status
Martin 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 MN02-0034-00 · Official waterbody report
County Ranking
Ranked #16 of 23 lakes in Anoka County
Nearby Lakes With Higher Grades
Martin Lake holds Grade D. 3 nearby lakes hold higher nutrient-and-algae grades — useful for a swim day, not a reason to skip lodging here.
See full comparison →Nearby Lakes in Anoka County
Frequently asked questions about Martin Lake
What is the water quality grade for Martin Lake?
- Martin Lake in Anoka County, Minnesota has a water quality grade of D (Nutrient-rich). Water clarity: 2.5 ft visibility. Phosphorus: 55 µg/L. Chlorophyll-a (algae): 29.4 µg/L. Maximum depth: 20 ft. Surface area: 232.31 acres.
Is Martin Lake safe to swim in?
- Nutrients and algae run higher than average — check local advisories before swimming, and skip the water if you see scum. Martin Lake has a water quality grade of D (Nutrient-rich). Algae concentration (chlorophyll-a) is 29.4 µg/L. Always check local health department advisories before swimming.
What is the water temperature of Martin Lake?
- Martin Lake typically sits around 79°F at the surface in August, from 144 EPA Water Quality Portal field readings (2016–2025). That is a typical value for the month, not a live reading.
How deep is Martin Lake?
- Martin Lake has a maximum depth of 20 feet. The lake covers 232.31 acres.
What fish are in Martin Lake?
- Fish species found in Martin Lake include black bullhead, black crappie, bluegill, brown bullhead, common carp, hybrid crappie, hybrid sunfish, northern pike, pumpkinseed, walleye, white crappie, yellow bullhead, yellow perch. Martin Lake is located in Anoka County, Minnesota.
When does Martin Lake thaw?
- Martin Lake typically has ice-out around Apr 8. Ice typically forms around Nov 23. The open water season is approximately 229 days.
Are there boat ramps on Martin Lake?
- Martin Lake has 1 documented boat landing in the USGS National Boat Ramps inventory. Named access points include Martin Lake. Public access is listed as yes.
Explore Martin 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 Anoka County
Species activity outlook by water temperature and season
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High nutrients, frequent algae, reduced clarity
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State Parks Near Martin Lake
Other Grade D Lakes in Minnesota
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Where this data comes from
310 measurements from 2 monitoring stations, 2020–2025. Retrieved from the EPA Water Quality Portal on 2026-08-02.
Collected and reported by
- Minnesota Pollution Control Agency - Ambient Surface Water
MNPCA310 samples · 2020–2025
Analytical methods
- Field measurement/observation, generic method
- Phosphorus by Colorimetry
- 10200 H ~ Chlorophyll a-b-c Determination
- Turbidity, Nephelometric Method
- Turbidity by Nephelometry
- Turbidity, Probe Method
Monitoring station identifiers (2)
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