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B

Winter Lake

Becker County, MinnesotaMesotrophic

Winter Lake comes in at a B on the grading rubric — a respectable showing for a Minnesota lake of its size and depth. Clarity, phosphorus, and chlorophyll-a all rate similarly, so there is no obvious single lever to pull on watershed management.

The lake sits in the mesotrophic zone — the band where most well-managed Minnesota lakes fall. The lake's maximum depth is not yet documented in state morphometric records — context for its physical structure remains limited. The lake's 117 acres and 1.8 miles of shoreline put it in the mid-range bucket — large enough for varied use, small enough that watershed inputs reach the whole basin. Winter Lake sits at rank 71 of 102 in Becker County, in the lower half of the local distribution.

Winter Lake has no invasive species recorded in Minnesota state databases as of 2025, though prevention practices still apply at all access points. Bass fishing is part of the appeal: the species list runs to 6, anchored by largemouth and/or smallmouth bass. Public access is available — the lake is on the Minnesota PCA public-access list. 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 2025-09-25. Grade methodology: LakeGrade methodology.

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Swimming Safety

Good for swimming, clear water with low algae levels

Water Quality Grade: B, Good

Moderate clarity, visible to about 6.9 ft. Phosphorus level: 22 µg/L. Trophic State Index: 49.

MetricValueGrade
Water Clarity (Secchi Depth)6.9 ftC
Phosphorus22 µg/LB
Chlorophyll-a (Algae)No data
Trophic State Index (TSI)49Mesotrophic

Moderate nutrients, good water quality

Lake Details

CharacteristicValue
Surface Area116.72 acres
Shoreline Length1.8 mi
Public AccessYes

Fish Species

Click a species to see every graded lake where it is documented.

→ Best fishing times for Winter Lake (14-day solunar calendar)

→ Is it safe to eat fish from Winter Lake? (mercury & PFAS guide)

Winter Lake fishing regulations (limits, seasons, special rules)

Water Quality Trend: Improving

Based on 3 years of monitoring data (2020-2025).

MetricTrendChange/YearYears
Water Clarity Improving+0.129 m/yr3
Phosphorus Improving-2.5 µg/L/yr2

Location

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County Ranking

Ranked #71 of 102 lakes in Becker County

Cleaner Lakes Within 30 Miles

Winter Lake holds Grade B. 5 nearby lakes hold higher grades.

See full comparison →

Nearby Lakes in Becker County

Reservoir Info (USACE NID)

Winter Lake is a man-made reservoir impounded by the Ogemash (completed 1966), built primarily for fish and wildlife pond on the Egg River; earth-type dam, 10 ft tall and 110 ft long.

Normal storage
72 ac-ft
Max storage
260 ac-ft
Drainage area
20.3 sq mi
Hazard class
Low
Owner
USFWS

Source: USACE National Inventory of Dams, NID ID MN00619 · Operator website · Matched by proximity (0.85 km)

Data Sources

Water quality data from the EPA Water Quality Portal

Grading methodology based on Metropolitan Council standards

Lake details from Minnesota DNR LakeFinder

Most recent sample: 2025-09-25

Monitoring stations: 1