Tamarac Lake
Becker County, MinnesotaMesotrophic
Tamarac Lake comes in at a B on the grading rubric — a respectable showing for a Minnesota lake of its size and depth. With clarity and phosphorus scored, the sub-grades cluster within a letter of each other, pointing to stable conditions rather than one specific stressor.
Mesotrophic conditions dominate at Tamarac Lake: enough nutrients for a healthy fishery, not so much that algal blooms become a chronic problem. A maximum depth of 34 ft puts Tamarac Lake in the middle of Minnesota's depth distribution. With 1,178 acres of surface and 9.7 miles of shoreline, Tamarac Lake is a large water by Minnesota standards — recreational pressure is spread across a long shoreline. Within Becker County's 93 graded lakes, Tamarac Lake ranks 60 — below the local median, though not at the bottom.
Zebra mussel presence at Tamarac Lake means the lake's clarity numbers carry an asterisk — filtered water is not the same as nutrient-poor water. The fishery includes walleye among the lake's 16 documented species — a notable draw for Minnesota anglers. Public access is available — the lake is on the Minnesota PCA public-access list. The lake has a partial ice record — 24 observed ice-outs, centered near Apr 24. 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 2023-08-14. Grade methodology: LakeGrade methodology.
Track Tamarac Lake
Subscribe for LakeQuality updates by email. No spam, unsubscribe anytime.
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: 20 µg/L. Trophic State Index: 48.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | 6.9 ft | C |
| Phosphorus | 20 µg/L | B |
| Chlorophyll-a (Algae) | No data | |
| Trophic State Index (TSI) | 48 | Mesotrophic |
Moderate nutrients, good water quality
Lake Details
| Characteristic | Value |
|---|---|
| Maximum Depth | 34 ft |
| Surface Area | 1.2K acres |
| Shoreline Length | 9.7 mi |
| Littoral Zone | 73% |
| Public Access | Yes |
Fish Species
Click a species to see all Minnesota and Wisconsin lakes where it is found.
→ Best fishing times for Tamarac Lake (14-day solunar calendar)
→ Is it safe to eat fish from Tamarac Lake? (mercury & PFAS guide)
→ Tamarac 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: ↓ Declining
Based on 5 years of monitoring data (2020-2025).
| Metric | Trend | Change/Year | Years |
|---|---|---|---|
| Water Clarity | → Stable | -0.009 m/yr | 5 |
| Phosphorus | ↓ Declining | +1.55 µg/L/yr | 5 |
Ice Season
Historical ice data from Minnesota DNR (33 observations).
Estimated open water season: 214 days
| Earliest | Latest | |
|---|---|---|
| Ice-Out | 2012-03-24 (2012) | 2013-05-12 (2013) |
| Ice-In | 2019-11-07 (2019) | 2009-12-05 (2009) |
Most recent ice-out: 2025-04-07
Location
County Ranking
Ranked #60 of 93 lakes in Becker County
Cleaner Lakes Within 30 Miles
Tamarac Lake holds Grade B. 4 nearby lakes hold higher grades.
- AFloyd LakeBecker County · mi · Higher grade (B → A)
- ASands LakeBecker County · mi · Higher grade (B → A)
- BMud LakeBecker County · mi · Higher overall water quality score
- BLittle Floyd LakeBecker County · mi · Higher overall water quality score
Nearby Lakes in Becker County
More Minnesota Lake Rankings
State Parks Near Tamarac Lake
Other Grade B Lakes in Minnesota
Mesotrophic Lakes in Minnesota
Compare Tamarac Lake With Nearby Lakes
DNR Fisheries Survey Summary
12 surveys on file from MN DNR Fisheries. Most recent: 2021-06-21 (Standard Survey).
Top Species by Catch Rate
| Species | Avg CPUE | Avg Weight |
|---|---|---|
| BNS | 217.31 | — |
| Bluntnose Minnow | 82.96 | — |
| Fathead Minnow | 66.65 | — |
| MMS | 49.09 | — |
| BKF | 38.26 | — |
| Bluegill | 27.16 | 0.2 lb |
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.
Bluegill
From the 2021-06-21 survey
Floyd (a.k.a., Big Floyd) Lake is a 1,212-acre lake located in Becker County two miles north of the city of Detroit Lakes. Floyd Lake's shoreline is heavily developed, and the lake receives a high amount of angling pressure and recreational use. Floyd Lake consists of two basins, the shallow larger main basin and the…
DNR Reports & Resources
Minnesota DNR LakeFinder publishes lake survey, fish stocking, water access, and aquatic plant data for Tamarac Lake. 3 reports on file.
- —Fisheries Lake Survey — FloydFisheries Lake Survey · MN DNR LakeFinder
- —Fish Stocking History — FloydFish Stocking History · MN DNR LakeFinder
- —Public Water Access Sites — FloydPublic Water Access Sites · MN DNR LakeFinder
EPA Impairment Status
Tamarac Lake is officially listed as impaired under Clean Water Act §303(d) in the 2024 EPA reporting cycle (IR category 4A).
Causes of impairment
A Total Maximum Daily Load (TMDL) plan has been approved.
Source: EPA ATTAINS assessment unit MN03-0387-01 · Official waterbody report · Matched by proximity (1.59 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: 2023-08-14
Monitoring stations: 1