Anna Lake
Anna Lake in Crow Wing County, Minnesota is not rated for water quality — its monitoring record does not meet the evidence bar. Water clarity: 11.5 ft visibility. Maximum depth: 19 ft. Surface area: 112.16 acres.
- Clarity
- 11.5 ft
- Max depth
- 19 ft
- Area
- 112 acres
- Trend
- ↑ Improving
- Public access
- No
- Ice-out
- Apr 19
- Open water
- 215 days
Next lake in Crow Wing County
Why Anna 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 Anna Lake, the only measurement available is water clarity, which is not a water-quality indicator on its own — EPA's National Lakes Assessment does not grade clarity. 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.
Anna Lake is a 112-acre lake in Crow Wing County, Minnesota with a maximum depth of 19 feet. Overall water quality is improving over recent sampling years. Limited fish-species data available. No public access — the lake is private or restricted.
Source: EPA Water Quality Portal sampling records, Minnesota DNR LakeFinder, last sampled 2021-08-13. Grade methodology: LakeGrade methodology.
Watch Anna Lake water quality
Subscribe for LakeQuality updates by email. No spam, unsubscribe anytime.
Swimming Safety
Not ratedLimited data
Not rated for swimming — there is not enough monitoring data to judge this lake
Water quality measurements for Anna Lake
These readings exist but do not meet the evidence bar for an A–F grade — see why.
Good clarity, visible to about 11.5 ft. Trophic State Index: 42.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | 11.5 ft | Not graded |
| Phosphorus | No recent samples | |
| Chlorophyll-a (Algae) | No recent samples | |
| Trophic State Index (TSI) | 42 | Mesotrophic |
Moderate nutrients, good water quality
Where to stay near Anna Lake
Compare lakeside cabins, hotels, and vacation rentals near Anna Lake in Crow Wing 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.
Top-rated places to stay near Anna Lake
Availability and prices from Stay22 partners (Booking.com, Vrbo, Expedia). We may earn a commission from bookings, at no extra cost to you.
Planning a whole trip? See where to stay at Minnesota’s top lakes →
Lake Details
| Characteristic | Value |
|---|---|
| Maximum Depth | 19 ft |
| Surface Area | 112 acres |
| Shoreline Length | 2.7 mi |
| Littoral Zone | 91% |
| Public Access | No |
Lake Size & Watershed
Size, shoreline, and watershed area from HydroLAKES (HydroSHEDS).
Fishing Anna Lake
DNR Fisheries Survey Summary
2 surveys on file from MN DNR Fisheries. Most recent: 1989-07-06 (Standard Survey).
Top Species by Catch Rate
| Species | Avg CPUE | Avg Weight |
|---|---|---|
| Pumpkinseed | 211.94 | 0.05 lb |
| Black Crappie | 36.56 | 0.08 lb |
| Northern Pike | 11.56 | 3.46 lb |
| Yellow Perch | 5.56 | 0.12 lb |
| White Sucker | 1.17 | 1.87 lb |
| Largemouth Bass | 0.75 | 0.13 lb |
CPUE = catch per unit effort, averaged across surveys (excludes juvenile shoreline seining). Higher CPUE = more abundant in standardized sampling.
From the 1989-07-06 survey
Lake class 36: The northern pike population is extremely high for the lake class 36, at 27.5 fish/net. Black crappie abundance is also high, with the individual being very small. Pumpkinseed population is extremely high but with a very small individual size. Yellow perch are present in moderate numbers.
DNR Reports & Resources
Minnesota DNR LakeFinder publishes lake survey, fish stocking, water access, and aquatic plant data for Anna Lake. 2 reports on file.
These links open on the official state DNR websites (Wisconsin DNR survey PDFs · Minnesota DNR LakeFinder).
- —Fisheries Lake Survey — AnnaFisheries Lake Survey · MN DNR LakeFinder
- —Aquatic Plant Report — Anna (0438)Aquatic Plant Report · MN DNR LakeFinder
Water Quality Trend: ↑ Improving
Based on 6 years of monitoring data (2020-2025).
| Metric | Trend | Change/Year | Years |
|---|---|---|---|
| Water Clarity | ↑ Improving | +0.403 m/yr | 6 |
Ice Season
Historical ice data from Minnesota DNR (18 observations).
Estimated open water season: 215 days
| Earliest | Latest | |
|---|---|---|
| Ice-Out | 2016-03-27 (2016) | 2022-05-04 (2022) |
| Ice-In | 2018-11-10 (2018) | 2015-11-24 (2015) |
Most recent ice-out: 2023-05-01
Graded lakes near Anna Lake
Anna Lake has no grade, but these lakes within a short drive do.
Nearby Lakes in Crow Wing County
Frequently asked questions about Anna Lake
What is the water quality grade for Anna Lake?
- Anna Lake in Crow Wing County, Minnesota is not rated for water quality — its monitoring record does not meet the evidence bar. Water clarity: 11.5 ft visibility. Maximum depth: 19 ft. Surface area: 112.16 acres.
Is Anna Lake safe to swim in?
- Not rated for swimming — there is not enough monitoring data to judge this lake. Anna 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 Anna Lake?
- Anna Lake has a maximum depth of 19 feet. The lake covers 112.16 acres.
When does Anna Lake thaw?
- Anna Lake typically has ice-out around Apr 19. Ice typically forms around Nov 20. The open water season is approximately 215 days.
Explore Anna Lake across LakeGrade
Fish species and top-graded lakes across Minnesota
Fish species and best lakes in Crow Wing County
Species activity outlook by water temperature and season
Top lakes and where to stay in the Brainerd Lakes area
Top lakes and where to stay in the Mille Lacs Area area
Where to stay at Minnesota's top lakes, each with its grade
Lakes in the Pine River Watersheds (Brainerd Lakes), ranked by water quality
Minnesota's cleanest and most-polluted lakes, ranked
More Minnesota Lake Rankings
State Parks Near Anna Lake
Other Lakes in Minnesota
Mesotrophic Lakes in Minnesota
Where this data comes from
6 measurements from 1 monitoring station, 2020–2021. Retrieved from the EPA Water Quality Portal on 2026-08-02.
Collected and reported by
- Minnesota Pollution Control Agency - Ambient Surface Water
MNPCA6 samples · 2020–2021
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
Lake size & watershed from HydroLAKES (HydroSHEDS)
Lake details from Minnesota DNR LakeFinder
Ice data from Minnesota DNR Climate