Iowa Fishing

Grundy County Lake

Grundy County Lake stands as one of eastern Iowa's premier highly-regarded River destinations for Iowa anglers. Grundy County Lake is located near eastern Iowa at coordinates 42.46, -92.64. The flowing waters create dynamic habitat with current breaks and deep pools ideal for Smallmouth Bass, Walleye, Brown Trout. Local anglers frequently report success with Smallmouth Bass, Walleye, Brown Trout at Grundy County Lake.

River Iowa 42.4600, -92.6400
Updated 2026-04-29

Location

View on Google Maps 42.4600, -92.6400

Target Species

Smallmouth BassSmallmouth BassWalleyeWalleyeBrown Trout

Fishing Tips

  • Focus on outside bends and deeper holes for Smallmouth Bass activity.
  • During post-spawn, deeper overhanging trees pools hold trophy Smallmouth Bass.
  • During winter months, deeper deeper holes pools hold trophy Smallmouth Bass.

Fishing Techniques for Grundy County Lake

Bank anglers can find productive water along accessible shoreline areas, while boat access opens up deeper structure and open water. Kayak and canoe fishing is also popular here. Bring a mix of topwater for early morning, moving baits for midday, and finesse rigs for pressured conditions.

What to Expect at Grundy County Lake

Take time to read the water when you arrive — baitfish activity, bird movement, and surface disturbances all signal where fish are feeding. The character of this river changes with the seasons, so repeat visits often reveal new patterns and productive spots you missed before.

Regulations

Current Iowa license mandatory. Iowa Department of Natural Resources maintains regulations on their website.

Fishing Tips for Grundy County Lake

Big Woods Lake

Alice Wyth Lake

Greenbelt Lake

Frequently Asked Questions

Fish sizes vary seasonally. Local fishing reports provide current catch information.

Yes, Grundy County Lake typically offers road access and parking for anglers.