Willow Reservoir 4
Olmsted County, Minnesota — DOW #55002000
31 Surveys
Special Regulations for Willow Reservoir 4
This lake has regulations that differ from statewide defaults. Always check before fishing.
- Combined possession limit one. The daily and possession limits for these species apply to the waters listed as a whole, that is, only one daily and possession limit may be taken from the group of waters that comprise the Rochester-Olmsted County Area Lakes (Rochester-Olmsted County Area Lakes includes: Bear Creek Reservoir (Chester Woods), Cascade Lake (Cascade Ponds), Foster Arend Lake, Gamehaven Lake (Boy Scout Lake or Willow Reservoir No. 4), Kalmar Reservoir, Quarry Hill Nature Center Pond, Manor Woods Pond (Country Club Pond), Silver Lake, Silver Creek Reservoir, Willow Creek Reservoir.)
- Possession limit one. The daily and possession limit of one for northern pike apply to the waters listed as a whole, that is, only one daily and possession limit may be taken from the group of waters that comprise the Rochester-Olmsted County Area Lakes (Rochester-Olmsted County Area Lakes includes: Bear Creek Reservoir (Chester Woods), Cascade Lake (Cascade Ponds), Foster Arend Lake, Gamehaven Lake (Boy Scout Lake or Willow Reservoir No. 4), Kalmar Reservoir, Quarry Hill Nature Center Pond, Manor Woods Pond (Country Club Pond), Silver Lake, Silver Creek Reservoir, Willow Creek Reservoir.)
- Combined possession limit ten, of which only five may be black or white crappie. The daily and possession limit for these species apply to the waters listed as a whole, that is, only one daily and possession limit may be taken from the group of waters that comprise the Rochester-Olmsted County Area Lakes. (Rochester-Olmsted County Area Lakes includes: Bear Creek Reservoir (Chester Woods), Cascade Lake (Cascade Ponds), Foster Arend Lake, Gamehaven Lake (Boy Scout Lake or Willow Reservoir No. 4), Kalmar Reservoir, Quarry Hill Nature Center Pond, Manor Woods Pond (Country Club Pond), Silver Lake, Silver Creek Reservoir, Willow Creek Reservoir.)
36.36
Acres
24 ft
Max Depth
6
Fish Species
2
Local Guides
DNR Fish Surveys
Catch-per-unit-effort (CPUE) data from Minnesota DNR fish population assessments on Willow Reservoir 4. Green = above normal range. Red = below normal.
CRC
| Date | Gear | CPUE | Normal Range | Avg Weight | Total Catch |
|---|---|---|---|---|---|
| 1991-05-16 | Standard gill nets | 9.5 | — | 0.37 lb | 19 |
| 1991-05-16 | Standard trap nets | 2.3 | — | 0.20 lb | 16 |
Green Sunfish
| Date | Gear | CPUE | Normal Range | Avg Weight | Total Catch |
|---|---|---|---|---|---|
| 1991-05-16 | Standard trap nets | 72.9 (above normal) | 0.3 – 2.3 | 0.20 lb | 510 |
| 1991-05-16 | Standard gill nets | 6.0 (above normal) | 0.2 – 0.3 | 0.30 lb | 12 |
White Sucker
| Date | Gear | CPUE | Normal Range | Avg Weight | Total Catch |
|---|---|---|---|---|---|
| 1991-05-16 | Standard trap nets | 2.3 (above normal) | 0.3 – 1.4 | 0.94 lb | 16 |
| 1991-05-16 | Standard gill nets | 22.5 (above normal) | 0.5 – 2.7 | 1.14 lb | 45 |
| 2016-04-26 | Standard electrofishing | 84.0 | — | — | 48 |
| 2023-05-08 | Standard electrofishing | 9.8 | — | 2.60 lb | 9 |
| 2002-06-17 | Standard gill nets | 8.0 (above normal) | 0.5 – 2.7 | 1.93 lb | 8 |
| 2002-06-17 | Standard trap nets | 0.4 (normal) | 0.3 – 1.4 | 1.96 lb | 2 |
Smallmouth Bass
| Date | Gear | CPUE | Normal Range | Avg Weight | Total Catch |
|---|---|---|---|---|---|
| 1991-05-16 | Standard gill nets | 0.5 (normal) | 0.2 – 1.4 | 1.88 lb | 1 |
Black Crappie
| Date | Gear | CPUE | Normal Range | Avg Weight | Total Catch |
|---|---|---|---|---|---|
| 2016-04-26 | Standard electrofishing | 1.8 | — | 0.24 lb | 1 |
| 2023-05-08 | Standard electrofishing | 104.6 | — | 0.24 lb | 96 |
| 2002-06-17 | Standard gill nets | 12.0 (above normal) | 0.6 – 3.5 | 0.18 lb | 12 |
| 2002-06-17 | Standard trap nets | 6.8 (above normal) | 0.7 – 3.4 | 0.23 lb | 34 |
Yellow Perch
| Date | Gear | CPUE | Normal Range | Avg Weight | Total Catch |
|---|---|---|---|---|---|
| 2016-04-26 | Standard electrofishing | 3.5 | — | 0.04 lb | 2 |
| 2023-05-08 | Standard electrofishing | 1.1 | — | 0.13 lb | 1 |
Yellow Bullhead
| Date | Gear | CPUE | Normal Range | Avg Weight | Total Catch |
|---|---|---|---|---|---|
| 2016-04-26 | Standard electrofishing | 28.0 | — | — | 16 |
| 2023-05-08 | Standard electrofishing | 3.3 | — | 1.43 lb | 3 |
| 2002-06-17 | Standard gill nets | 3.0 (normal) | 1.0 – 10.5 | 0.50 lb | 3 |
| 2002-06-17 | Standard trap nets | 2.2 (normal) | 1.3 – 9.8 | 0.72 lb | 11 |
Largemouth Bass
| Date | Gear | CPUE | Normal Range | Avg Weight | Total Catch |
|---|---|---|---|---|---|
| 2016-04-26 | Standard electrofishing | 92.8 | — | 2.74 lb | 53 |
| 2023-05-08 | Standard electrofishing | 71.9 | — | 1.66 lb | 66 |
| 2002-06-17 | Standard electrofishing | 46.1 | — | 0.64 lb | 50 |
| 2002-06-17 | Standard gill nets | 1.0 (normal) | 0.3 – 1.7 | 1.96 lb | 1 |
Bluegill
| Date | Gear | CPUE | Normal Range | Avg Weight | Total Catch |
|---|---|---|---|---|---|
| 2016-04-26 | Standard electrofishing | 120.8 | — | 0.17 lb | 69 |
| 2023-05-08 | Standard electrofishing | 186.3 | — | 0.17 lb | 171 |
| 2002-06-17 | 1/4-in trap nets | 1.2 | — | — | 6 |
| 2002-06-17 | Standard trap nets | 48.4 (above normal) | 6.1 – 46.6 | 0.20 lb | 242 |
| 2002-06-17 | Standard gill nets | 2.0 | — | 0.19 lb | 2 |
Hybrid Sunfish
| Date | Gear | CPUE | Normal Range | Avg Weight | Total Catch |
|---|---|---|---|---|---|
| 2002-06-17 | Standard trap nets | 0.2 | — | 0.31 lb | 1 |
Depth Maps & Lake Info
Map & Directions
Get DirectionsShowing 14 nearby bait & tackle shops on the map.
Nearby Bait & Tackle
Boundary Line Outfitters
Rochester, MN
★ 5Coyote Creek Outdoors
Rochester, MN
★ 4.5Sierra
Rochester, MN
★ 4.5Snow Country Outfitters Minnesota
Byron, MN
★ 5Sportsman's Rack
Rochester, MN
★ 4.7Flowstone Fishing
Lanesboro, MN
★ 5Jim's Marketplace Foods
Austin, MN
★ 4.3Marshalls
Austin, MN
★ 4.4Nearby Marinas
Resorts & Lodges Near Willow Reservoir 4
Plan your stay — fishing resorts and lodges near Willow Reservoir 4.
Fish Species
Species known to inhabit Willow Reservoir 4. Click any species for a full fishing guide.
Fishing Guides Near Willow Reservoir 4
Other Lakes in Olmsted County
Plan Your Trip to Willow Reservoir 4
- Weather forecast for Willow Reservoir 4 — check wind, rain, and temperature before you go
- GPS: 43.9478°N, 92.4379°W — Get Directions
- View on MN DNR LakeFinder for the latest survey data and lake info
- Review Minnesota fishing regulations for season dates and limits
- A Minnesota fishing license is required for ages 16+ — buy online at dnr.state.mn.us
Data sourced from Minnesota DNR Division of Fish and Wildlife. Last verified: March 19, 2026. Learn how we maintain this data.