Three Mile Lake fishing: Walleye, Muskellunge, Blue Catfish
Target species: Walleye, Muskellunge, Blue Catfish, Bluegill, Sunshine Bass
The reservoir
Three Mile Lake covers 801 acres in Iowa, across Union County. It is a reservoir: 92.9% of it is 33 feet deep or less; the deepest point measured is at least 48 feet (14.6 m). Our records hold 5 species for this water.
5 target fish, led by Walleye
- Walleye — Feeding water: 50–75°F.
- Muskellunge — Feeding water: 65–75°F.
- Blue Catfish — Feeding water: 70–85°F.
- Bluegill — Feeding water: 70–85°F.
- Sunshine Bass — Feeding water: 70–80°F. Nonnative.
Stocking: 3,734,698 fish, 2012–2025
Iowa DNR records list 3,734,698 fish released into this water from 2012 to 2025.
- Walleye: 3,480,689 in 2012–2025
- Blue Catfish: 110,804 in 2016–2022
- Bluegill: 94,823 in 2016–2025
- Muskellunge: 880 in 2012
One more species on the stocking list.
Depth and bottom
Deepest measured point: at least 48 ft (14.6 m). That is the deepest contour line: the bottom goes deeper. 92.9% of the water is 33 feet or shallower. We hold 81 depth contour lines for this water.
- 0–3 ft: 10.3% of the water
- 3–6 ft: 10.3% of the water
- 6–9 ft: 12.3% of the water
- 9–12 ft: 10.6% of the water
- 12–15 ft: 10% of the water
- 15–18 ft: 8.3% of the water
- 18–21 ft: 7.6% of the water
- 21–24 ft: 7.3% of the water
- 24–27 ft: 5.9% of the water
- 27–30 ft: 5.9% of the water
- 30–33 ft: 4.4% of the water
- 33–36 ft: 3.5% of the water
- 36–39 ft: 2.7% of the water
- 39–42 ft: 1.1% of the water
Water and conditions
Our water temperature readings average 75°F; they do not cover the whole year, so this is not a yearly average. pH averages 8.2. These readings span 2017–2024.
Where this data comes from
- Iowa DNR — Iowa DNR: depth contours: class A, a survey of the bottom.
