What you'll find at Mary Jane Thurston State Park

Mary Jane Thurston State Park sits along the Maumee River near Grand Rapids, Ohio, about 20 miles south of Toledo. The park is built around a historic hydroelectric dam and lock system, and the water impoundment behind it creates a slow-moving pool that holds walleye, bass, catfish, and pike. The shoreline is accessible from the park's boat launch and fishing areas, making it one of the more convenient Maumee access points if you want to fish without wading into current or navigating a narrow channel.

The park itself is small—mostly day-use—but the fishing water is substantial. The pool behind the dam runs several miles upstream, and the current slows enough that you can fish from a boat without fighting heavy flow. The dam structure itself creates habitat: the concrete face and the rocks below hold catfish and walleye, especially in low-light hours. If you're new to the Maumee system and want to start somewhere less intimidating than the main river channel, this is a reasonable entry point.

Key Takeaways

  • Mary Jane Thurston State Park offers a boat launch and shoreline access to a slow-moving pool behind a historic dam on the Maumee River.
  • Walleye, catfish, and bass are the primary species; walleye bite best in spring and fall, catfish in summer.
  • The dam structure and the pool above it hold fish year-round, but water level fluctuations tied to hydroelectric operation can affect fishing conditions.
  • The park is day-use only with limited facilities, so plan your trip accordingly and bring what you need.

Walleye fishing in the pool

Walleye in the Maumee pool at Mary Jane Thurston respond to the same patterns as they do elsewhere in the system: they prefer low light and structure. Early morning and dusk are your best windows, especially in spring (April through May) and fall (September through October). During these seasons, walleye move shallow to feed, and the pool's slower water makes them easier to locate than they are in the main river channel.

Live shiners or small crawfish work well if you're casting from shore or a boat. Jigs tipped with minnows are reliable year-round. Work the dam face, the deeper holes in the pool, and any rocky or woody structure you can find. The water clarity in the pool is usually better than in the main Maumee, so walleye can be more line-shy; use 6- to 8-pound fluorocarbon and keep your presentation subtle. In summer, walleye retreat to deeper water in the pool's center, and fishing slows considerably.

Catfish and bass in warmer months

Channel catfish and flatheads move into the pool in late spring and stay through fall. They're less picky than walleye and will take cut bait, chicken liver, or prepared stink baits. Fish the deeper holes and the dam structure at night or in the early morning. Flatheads prefer live bait and are more active after dark, so if you want to target them specifically, plan an evening trip with live bluegill or shiners.

Largemouth and smallmouth bass inhabit the pool's shallower areas and weed edges. Spring and early summer are prime; throw topwater lures or soft plastics near any vegetation or fallen timber. The pool's slower current means bass don't need to position themselves as aggressively as they do in moving water, so cover more ground and work structure methodically.

Water level and dam operation

The dam at Mary Jane Thurston is operated for hydroelectric generation, which means water levels can rise and fall throughout the day. These fluctuations affect fishing: a rising pool can push fish into shallower areas and trigger feeding, while a falling pool can concentrate them in deeper holes. Check the water level before you go if you're planning to fish specific shallow-water structure—what was fishable yesterday might be exposed today.

The dam's operation also creates current below the structure, which can be strong during peak generation hours. If you're fishing the tailrace (the water immediately below the dam), be aware of sudden level changes and stay alert. Most anglers fish the pool itself rather than the tailrace, which is safer and often more productive anyway.

Facilities and access

Mary Jane Thurston State Park has a boat launch, parking, and basic restroom facilities. There is no camping, no lodging, and no food service, so plan accordingly. The launch is well-maintained and can handle most trailers. Parking is free with an Ohio State Parks pass or a daily vehicle permit, which you can purchase at the entrance.

The park is open dawn to dusk. If you're planning an evening catfish trip, confirm the park's closing time before you arrive—you may need to fish from a boat and exit before dark rather than fishing from shore. The shoreline is accessible for walk-and-wade fishing, but the pool's slow current makes boat fishing more productive for most species.

When to fish and what to expect

Spring (April through May) is the most reliable season for walleye. The water is cool, walleye are actively feeding, and the pool is usually at a stable level. Fall (September through October) is nearly as good, with the added benefit of fewer crowds. Summer brings catfish and bass but walleye fishing slows. Winter is possible but the pool can ice over, and access becomes limited.

Mary Jane Thurston is less crowded than the main Maumee channel near Waterville or the lower river near Perrysburg, which makes it a good choice if you want a quieter experience. The trade-off is that the pool's slower water and smaller size mean fewer fish overall. If you're looking for high-volume walleye fishing, the main channel will outproduce this spot. If you want a more relaxed day with decent odds and easier access, Mary Jane Thurston is worth the trip.

Frequently Asked Questions

Do I need a boat to fish Mary Jane Thurston?

No. The park has shoreline access and you can fish from shore, especially near the dam structure and along the pool's edges. A boat gives you more water to cover and better access to deeper holes, but it's not required.

What's the best time of year to fish here?

Spring (April through May) and fall (September through October) are best for walleye. Summer is better for catfish and bass. Winter is possible but access can be limited by ice.

Can I fish at night?

The park closes at dusk, so night fishing from shore is not permitted. If you want to fish after dark, you would need to launch a boat before closing and fish from the water, though this is not recommended without local knowledge of the pool and dam operation.

How far is Mary Jane Thurston from Toledo?

The park is about 20 miles south of Toledo, roughly a 30-minute drive. From downtown Toledo, take US-23 south toward Grand Rapids, then follow signs to the park.

What should I bring?

Bring water, sunscreen, and whatever tackle and bait you plan to use—there's no bait shop at the park. A life jacket is required if you're boating. Check the weather and water conditions before you leave, and bring a phone in case of emergency.