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.
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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.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | 16.2 ft | A |
| Phosphorus | No data | |
| Chlorophyll-a (Algae) | No data | |
| Trophic State Index (TSI) | 37 | Oligotrophic |
Low nutrients, clear water, excellent for swimming
Lake Details
| Characteristic | Value |
|---|---|
| Maximum Depth | 62 ft |
| Surface Area | 596.86 acres |
| Shoreline Length | 4.7 mi |
| Littoral Zone | 31% |
| Public Access | Yes |
Fish Species
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.
Water Quality Trend: ↑ Improving
Based on 5 years of monitoring data (2020-2025).
| Metric | Trend | Change/Year | Years |
|---|---|---|---|
| Water Clarity | ↑ Improving | +0.11 m/yr | 5 |
| Phosphorus | → Stable | +0.1 µg/L/yr | 5 |
Ice Season
Historical ice data from Minnesota DNR (83 observations).
Estimated open water season: 219 days
| Earliest | Latest | |
|---|---|---|
| Ice-Out | 2016-03-31 (2016) | 2013-05-12 (2013) |
| Ice-In | 1991-11-04 (1991) | 1999-12-16 (1999) |
Most recent ice-out: 2018-04-30
Location
County Ranking
Ranked #24 of 97 lakes in Otter Tail County
Nearby Lakes in Otter Tail County
More Minnesota Lake Rankings
State Parks Near West Mcdonald Lake
Other Grade A Lakes in Minnesota
Oligotrophic Lakes in Minnesota
Compare West Mcdonald Lake With Nearby Lakes
DNR Fisheries Survey Summary
11 surveys on file from MN DNR Fisheries. Most recent: 2025-06-09 (Targeted Survey).
Top Species by Catch Rate
| Species | Avg CPUE | Avg Weight |
|---|---|---|
| Largemouth Bass | 33.60 | 0.55 lb |
| Bluegill | 29.17 | 0.18 lb |
| MMS | 22.18 | — |
| Bluntnose Minnow | 16.86 | — |
| Yellow Bass | 10.39 | 0.72 lb |
| BMS | 8.36 | — |
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
Bluegill
Yellow Bass
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…
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.
- —Fisheries Lake Survey — West McDonaldFisheries Lake Survey · MN DNR LakeFinder
- —Fish Stocking History — West McDonaldFish Stocking History · MN DNR LakeFinder
- —Public Water Access Sites — West McDonaldPublic Water Access Sites · MN DNR LakeFinder
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
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