What the Des Moines River offers anglers

The Des Moines River is a warmwater system that runs roughly 340 miles from its headwaters in Minnesota down through central Iowa to the Mississippi. It's not a trophy fishery in the sense of producing giant fish regularly, but it's a working river with solid populations of walleye, channel catfish, flathead catfish, and largemouth bass. The character changes as you move downstream—the upper reaches near Fort Dodge are narrower and shallower, while the lower river below Saylorville Reservoir gets deeper and slower, which changes what you're targeting and when.

Most anglers fish the impoundments and slack-water areas rather than the main current. Saylorville Reservoir, just north of Des Moines, is the most popular section and holds the largest walleye population. Below the dam, the river settles into a more predictable pattern with defined channels, backwater lakes, and wing dams that concentrate fish. The water is typically turbid—especially after rain—which actually helps your presentation because fish rely more on vibration and sound than sight.

Key Takeaways

  • Walleye fishing peaks in spring (April–May) and fall (September–October) on Saylorville Reservoir and the lower river, with summer requiring deeper structure and night fishing.
  • Channel catfish are available year-round in the lower Des Moines, especially in deeper holes and near the dam tailrace, and respond well to cut bait and chicken liver.
  • Flathead catfish have become established in the lower river and prefer live baitfish at night, particularly in summer and fall.
  • Wing dams, lock and dam tailraces, and the deeper pools below Saylorville hold the most consistent fish populations.
  • Water level fluctuations from dam releases can change fishing conditions rapidly, so checking the Army Corps of Engineers release schedule before you go saves wasted trips.

Walleye patterns on Saylorville Reservoir

Saylorville Reservoir is the heart of Des Moines walleye fishing. The lake covers about 26,000 acres and has a maximum depth around 45 feet, though most of the productive water is 15 to 30 feet. Spring (April through May) is the most predictable time—walleye move shallow to spawn, and you'll find them on the flats and along the old river channel in 8 to 15 feet of water. Live shiners or small crankbaits work well, and dawn and dusk are prime, but you can catch them throughout the day if you're patient.

Summer is tougher because walleye drop into the deeper holes and become more nocturnal. If you're fishing during the day, focus on the deepest water you can find—the old river channel running through the middle of the lake holds fish in 30+ feet. Jigs tipped with live minnows or soft plastics work better than crankbaits when fish are deep and inactive. Night fishing with live bait or slow-moving crankbaits along the shallower structure (10–20 feet) is often more productive than daytime fishing in July and August.

Fall (September through October) brings another strong bite as water cools and walleye move back to shallower structure. The same areas that worked in spring become active again. By November, the bite slows as water temperature drops below 50 degrees, and fish become less aggressive, though they're still catchable on live bait fished slowly in deeper holes.

Channel and flathead catfish in the lower river

Below Saylorville Dam, the Des Moines becomes a catfish river. Channel catfish are present year-round and are more forgiving than walleye—they'll eat cut shad, chicken liver, stink bait, or live bluegill without much fussing. Fish the deeper holes, especially where the river bends and scours out a deeper pocket. The tailrace below the dam is always worth checking because the current and aeration attract baitfish, which draw catfish. Summer and fall are the most active seasons, but you can catch channels in winter if you're willing to sit in the cold.

Flathead catfish have expanded their range in the Des Moines over the past 15 years and are now common in the lower river. Unlike channel cats, flatheads are predators and prefer live baitfish—live bluegill, shiners, or small shad work best. They're almost exclusively nocturnal, so plan to fish from dusk through midnight or later. Summer and early fall are peak season. Flatheads grow larger than channels in this system, and a 40-pound fish is not out of the question, though 15 to 25 pounds is more typical.

Wing dams and lock-and-dam structure

The Des Moines has several lock-and-dam complexes, and the tailraces below each one are reliable fishing spots. The current and turbulence create feeding zones where baitfish get disoriented and larger fish position themselves to feed. Walleye, catfish, and bass all use these areas. Fish the slack water immediately below the dam face, where the current slows, and also the deeper pools that form downstream. Early morning and late evening are best, but the tailraces can produce throughout the day because the structure and current provide shade and feeding opportunity regardless of time.

Wing dams—the rock structures built perpendicular to the bank to direct current and prevent erosion—are equally important. They create current breaks where fish hold. The upstream side of a wing dam is usually slower and shallower; the downstream side drops off and has more current. Walleye often hold on the downstream side in 10 to 20 feet of water, especially in spring and fall. Cast upstream and let your jig or crankbait drift naturally with the current, then work it back slowly. Catfish hold in the deeper pockets on the downstream side and respond to live or cut bait fished on the bottom.

Seasonal timing and water conditions

Spring (March–May) is the most accessible time to fish the Des Moines. Water is warming, fish are active, and you don't need specialized techniques. Walleye are shallow and aggressive, catfish are feeding, and bass are spawning. The downside is that spring rains can muddy the water and cause dam releases that change water levels rapidly.

Summer (June–August) requires more effort. Walleye are deep and nocturnal, so you're either fishing at night or targeting catfish, which are less picky about time of day. The water is often warm and low, concentrating fish in the deepest holes. Flathead catfish are most active in summer, so if you're interested in that species, this is your season.

Fall (September–November) rivals spring for overall fishing quality. Water cools, walleye move back to shallower structure, and catfish are still active. The weather is usually pleasant, and the crowds are lighter than in spring. By late November, the bite slows as water temperature drops, but it doesn't stop entirely.

Winter (December–February) is slow but possible. Walleye are deep and inactive, but live bait fished slowly in the deepest holes will produce. Catfish are less active but still present. Ice fishing is not typically an option on the Des Moines because the current and dam releases prevent reliable ice formation.

Understanding dam releases and water levels

The Army Corps of Engineers operates Saylorville Dam and controls water releases. These releases can change water level and current dramatically in a matter of hours. A large release can turn a fishable river into a muddy, fast current that's unsafe and unproductive. Before you go, check the Corps' website or call the Saylorville Lake Project Office to see what releases are scheduled. If a large release is planned, either fish early in the day before the release happens or plan your trip for a day when releases are minimal.

Water level changes also affect where fish hold. When water is rising, fish move shallow and feed aggressively. When water is falling, fish move deeper and become more cautious. If you're fishing and the water level starts dropping noticeably, move to deeper structure rather than staying in the shallows where you started.

Gear and tackle for Des Moines fishing

For walleye, a 6-foot to 6.5-foot medium-action spinning rod with 8- to 10-pound braided line works well. Jigs in the 1/8- to 3/8-ounce range are standard, tipped with live minnows or soft plastics. Crankbaits in the 2- to 4-inch range are effective in spring and fall. For catfish, a heavier setup is better—a 7-foot medium-heavy rod with 12- to 20-pound line and a basic slip sinker rig or three-way rig. Circle hooks in size 2/0 to 5/0 are standard for catfish because they hook themselves and reduce gut-hooking.

The turbid water of the Des Moines means fish rely on vibration and smell more than sight. Darker-colored jigs and crankbaits work better than bright colors. For catfish, scent is everything—the smellier the bait, the better. Cut shad, chicken liver, and commercial stink baits all work. Live bait is more effective than dead bait for flatheads and for walleye in summer.

Frequently Asked Questions

What's the best time of year to fish the Des Moines River?

Spring (April–May) and fall (September–October) are most consistent for walleye and catfish. Spring offers aggressive fish in shallower water; fall offers similar conditions with better weather and fewer anglers. Summer requires more effort and specialized techniques, especially for walleye.

Do I need a boat to fish the Des Moines?

A boat is helpful but not required. Saylorville Reservoir has public boat ramps and is best fished from a boat. The lower river has several access points where you can wade or fish from shore, particularly near the lock-and-dam areas and wing dams. Check the Iowa Department of Natural Resources website for public access locations.

What's the difference between channel catfish and flathead catfish?

Channel catfish are scavengers and eat dead bait, cut bait, and prepared stink baits. Flatheads are predators and prefer live baitfish, especially at night. Flatheads grow larger and are more aggressive. Both are good eating, though flatheads have firmer meat.

How do dam releases affect fishing?

Large releases increase current, muddy the water, and make fishing difficult or unsafe. Check the Army Corps of Engineers release schedule before you go. Fish early in the day before releases happen, or plan your trip for low-release days. Rising water often triggers feeding; falling water makes fish more cautious.

What license do I need to fish the Des Moines?

You need a valid Iowa fishing license. Licenses are available through the Iowa Department of Natural Resources website or at most bait shops and sporting goods stores. A one-day license is available if you don't want to commit to a full-year license.