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West Mcdonald Lake

Otter Tail County, MinnesotaLimited DataOligotrophic

West Mcdonald Lake earns an A — every scored parameter (clarity) rates among the best monitored waters in Otter Tail County.

A TSI value of 37 puts West Mcdonald Lake in the oligotrophic range, where biological productivity stays low and the water column remains clear. At 62 ft of maximum depth, West Mcdonald Lake stratifies reliably through the summer — the hypolimnion stays cooler and clearer than the surface layer suggests. West Mcdonald Lake covers 597 acres alongside 4.7 miles of shoreline — a mid-sized water that supports a working fishery without being so large that conditions diverge between basins. Among the 97 graded lakes in Otter Tail County, West Mcdonald Lake ranks 24 — in the top quartile locally.

West Mcdonald Lake is on the Minnesota infested-waters list for zebra mussels — boaters should follow clean-drain-dry protocols when moving gear to or from the lake. The fishery includes walleye among the lake's 15 documented species — a notable draw for Minnesota anglers. A documented public access point at West Mcdonald Lake makes the lake usable for shore fishing, paddle craft, and trailered boats. The lake has a long ice-out record — 47 observations on file, with a median ice-out around Apr 20. 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 2024-08-01. Grade methodology: LakeGrade methodology.

Reviewed by LakeQuality Editorial Team · Updated

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Swimming Safety

Excellent for swimming, crystal clear water with minimal algae

Water Quality Grade: A, Excellent

Crystal clear, you can see 16.2 ft down. Trophic State Index: 37.

MetricValueGrade
Water Clarity (Secchi Depth)16.2 ftA
PhosphorusNo data
Chlorophyll-a (Algae)No data
Trophic State Index (TSI)37Oligotrophic

Low nutrients, clear water, excellent for swimming

Lake Details

CharacteristicValue
Maximum Depth62 ft
Surface Area596.86 acres
Shoreline Length4.7 mi
Littoral Zone31%
Public AccessYes

Fish Species

black bullhead,black crappie,bluegill,brown bullhead,common carp,green sunfish,hybrid sunfish,largemouth bass,northern pike,pumpkinseed,rock bass,walleye,white sucker,yellow bullhead,yellow perch

Click a species to see all Minnesota and Wisconsin lakes where it is found.

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

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

West Mcdonald Lake fishing regulations (limits, seasons, special rules)

Invasive & Introduced Species

Red chips are ecologically harmful invasive species. Gray chips are stocked or introduced fish that aren't a current ecological concern.

zebra mussel

Water Quality Trend: Improving

Based on 5 years of monitoring data (2020-2025).

MetricTrendChange/YearYears
Water Clarity Improving+0.11 m/yr5
Phosphorus Stable+0.1 µg/L/yr5
See year-by-year chart →

Ice Season

Historical ice data from Minnesota DNR (83 observations).

Typical Ice-Out
Apr 20
Typical Ice-In
Nov 25

Estimated open water season: 219 days

EarliestLatest
Ice-Out2016-03-31 (2016)2013-05-12 (2013)
Ice-In1991-11-04 (1991)1999-12-16 (1999)

Most recent ice-out: 2018-04-30

Location

Loading map…

County Ranking

Ranked #24 of 97 lakes in Otter Tail County

Nearby Lakes in Otter Tail County

DNR Fisheries Survey Summary

11 surveys on file from MN DNR Fisheries. Most recent: 2025-06-09 (Targeted Survey).

Top Species by Catch Rate

SpeciesAvg CPUEAvg Weight
Largemouth Bass33.600.55 lb
Bluegill29.170.18 lb
MMS22.18
Bluntnose Minnow16.86
Yellow Bass10.390.72 lb
BMS8.36

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.

Largemouth Bass

45 fish · 419 in · 2025-06-09
840trophy 204681012141618

Bluegill

114 fish · 39 in · 2019-08-19
44220trophy 103456789

Yellow Bass

605 fish · 714 in · 2019-08-19
1587907891011121314

From the 2025-06-09 survey

West McDonald Lake is a 573-acre mesotrophic (moderately fertile) lake located in north-central Otter Tail County, approximately four miles south of Vergas, MN. West McDonald Lake is within the Otter Tail River Watershed. There are no inlets or outlets connected to West McDonald Lake. The immediate watershed is…

Source: MN DNR LakeFinder Fisheries Lake Survey

DNR Reports & Resources

Minnesota DNR LakeFinder publishes lake survey, fish stocking, water access, and aquatic plant data for West Mcdonald Lake. 3 reports on file.

Reservoir Info (USACE NID)

West Mcdonald Lake is a man-made reservoir impounded by the Mcdonald Lakes (completed 1937), built primarily for recreation on the Dead River-TR; other-type dam, 7 ft tall and 34 ft long.

Surface area
561 ac
Normal storage
25,593 ac-ft
Max storage
28,287 ac-ft
Drainage area
6.99 sq mi
Hazard class
Low
Owner
MNDNR

Source: USACE National Inventory of Dams, NID ID MN00200 · Operator website · Matched by proximity (0.69 km)

EPA Impairment Status

West Mcdonald Lake is officially listed as impaired under Clean Water Act §303(d) in the 2024 EPA reporting cycle (IR category 5).

Causes of impairment

Impaired biota (cause unknown)Mercury

A Total Maximum Daily Load (TMDL) plan has been approved.

Source: EPA ATTAINS assessment unit MN56-0386-01 · Official waterbody report · Matched by proximity (2.41 km)

Data Sources

Water quality data from the EPA Water Quality Portal

Impairment status from EPA ATTAINS 303(d) database

Grading methodology based on Metropolitan Council standards

Lake details from Minnesota DNR LakeFinder

Ice data from Minnesota DNR Climate

Most recent sample: 2024-08-01

Monitoring stations: 1