Minnesota DNR fisheries surveys · latest July 15, 2019
Ann Lake FishingAWater-quality grade A
Minnesota DNR surveys at Ann Lake average 6.80 northern pike per unit of sampling effort (CPUE) across 6 surveys. The most recent is a Standard Survey dated July 15, 2019. Length samples in the latest survey that recorded them ran 8–36 inches. In Sherburne County, Minnesota, Ann Lake carries an overall water-quality grade of A. Water clarity averages 11.5 feet of visibility, and there is one public boat landing. The survey figures on this page are Minnesota DNR's own; the water-quality grade comes from EPA Water Quality Portal samples. Neither is a forecast of today's bite.
Species recorded at Ann Lake
10 species on the Minnesota DNR list for this lake. A species on the list has been recorded here; it does not mean it is catchable today or in every part of the lake.
Stocking at Ann Lake
No stocking record for Ann Lake appears in the Minnesota DNR material on file. That is an absence in the published record, not a confirmation that the lake is unstocked — some waters are managed as naturally reproducing and never appear in a stocking list at all.
Getting on the water
1 public boat landing is recorded on Ann Lake. Minnesota DNR lists the public access sites, including ramp type and parking, in the documents below.
Survey results in full
Minnesota DNR surveys at Ann Lake average 6.80 northern pike per unit of sampling effort (CPUE) across 6 surveys. The most recent is a Standard Survey dated July 15, 2019. Length samples in the latest survey that recorded them ran 8–36 inches.
A DNR fisheries survey reports fish abundance and catch rates, not a water-quality grade. LakeQuality grades Ann Lake A from EPA Water Quality Portal chemistry, and the water-quality trend over 3 years of monitoring is declining. Catch rate is not a swim clearance and is not a weekly bite report.
DNR Fisheries Survey Summary
6 surveys on file from MN DNR Fisheries. Most recent: 2019-07-15 (Standard Survey).
Top Species by Catch Rate
| Species | Avg catch rate (CPUE) | Avg Weight |
|---|---|---|
| Bluegill | 65.14 | 0.1 lb |
| Yellow Bass | 43.62 | 0.44 lb |
| Pumpkinseed | 7.20 | 0.16 lb |
| Northern Pike | 6.80 | 2.39 lb |
| Largemouth Bass | 5.72 | 1.65 lb |
CPUE = catch per unit effort, averaged across surveys (excludes juvenile shoreline seining). Higher CPUE means more abundant in standardized sampling. This is not a weekly bite report.
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
Pumpkinseed
Northern Pike
From the 2019-07-15 survey
Ann Lake is located in Sherburne County, five miles west of Zimmerman. The lake is 184 acres with a maximum depth of 26 feet. The watershed is small and is dominated by forest and the lake is lightly developed. The lake has excellent water quality and a diverse aquatic plant community. A public access is located on…
DNR Reports & Resources
Minnesota DNR LakeFinder publishes lake survey, fish stocking, water access, and aquatic plant data for Ann Lake. 3 reports on file.
These links open on the official state DNR websites (Wisconsin DNR survey PDFs · Minnesota DNR LakeFinder).
- —Fisheries Lake Survey — AnnFisheries Lake Survey · MN DNR LakeFinder
- —Aquatic Plant Report — Ann (1369)Aquatic Plant Report · MN DNR LakeFinder
- —Public Water Access Sites — AnnPublic Water Access Sites · MN DNR LakeFinder
Common questions
What fish are in Ann Lake?
Minnesota DNR surveys at Ann Lake average 6.80 northern pike per unit of sampling effort (CPUE) across 6 surveys. The most recent is a Standard Survey dated July 15, 2019. Length samples in the latest survey that recorded them ran 8–36 inches. Minnesota DNR lists 10 species for the lake in total. Those are survey results, not a catch report: a net set on one date measures what was in that net.
When was Ann Lake last surveyed?
The most recent fisheries survey on file for Ann Lake is dated July 15, 2019. Survey intervals vary by lake and by species; a gap of several years between surveys is normal and does not mean the record is missing.
Is Ann Lake stocked?
No stocking record for Ann Lake appears in the Minnesota DNR material on file. That is not the same as a confirmed unstocked lake: it means no stocking document was published for it in the records this page draws on.
Does the water-quality grade tell me how Ann Lake fishes?
A DNR fisheries survey reports fish abundance and catch rates, not a water-quality grade. LakeQuality grades Ann Lake A from EPA Water Quality Portal chemistry, and the water-quality trend over 3 years of monitoring is declining. Catch rate is not a swim clearance and is not a weekly bite report.
Before you eat what you catch
A water-quality grade is not a consumption advisory. Mercury and PCB advice for Minnesota waters comes from MDH, and it is issued per species and per size class — a lake can grade well and still carry a meal limit on larger predator fish.
Where to stay near Ann Lake
Top-rated places to stay near Ann Lake
Planning a trip to Ann Lake?
Get lake water-quality report cards plus the best cabin & lodging deals near Ann Lake — straight to your inbox. No spam, unsubscribe anytime.