What Rainbow Lake offers anglers

Rainbow Lake is a shallow, weedy chain lake just outside Waupaca that holds panfish and pike in roughly equal measure. The lake runs about 200 acres across multiple connected basins, with depths rarely exceeding 20 feet and much of it shallower than 12 feet. That shallow character makes it a different kind of fishery than the deeper Waupaca Chain lakes to the north—better for bluegill and crappie in spring and early summer, and a solid pike lake from ice-out through June.

The weed growth here is heavy and persistent. That's the defining feature of Rainbow. Coontail, cabbage, and milfoil choke the shallower basins by mid-June, which concentrates panfish into predictable spots but also means you'll spend time picking vegetation off your line. Pike use the same weeds as ambush cover, so if you're throwing topwater or soft plastics in the vegetation, you're fishing the right way.

Access is straightforward. There's a public boat launch on the south end of the lake, with parking and a small fee. The launch is adequate for small to medium boats; the lake itself is protected enough that even modest aluminum rigs handle it well on calm days.

Key Takeaways

  • Rainbow Lake is shallow and heavily weeded, making it excellent for bluegill and crappie in spring and early summer, and for pike year-round.
  • The public launch on the south end is the main access point, and the lake is manageable for small boats but can get choppy in wind.
  • Early morning and evening are most productive, especially in summer when midday heat pushes fish deeper into the weeds or into the few deeper holes.
  • Panfish respond well to small jigs and live bait; pike fishing improves when you work the weed edges and deeper transition zones between basins.

Spring panfish and pike through June

Rainbow wakes up fast in spring. By late April, bluegill move into the shallower bays to spawn, and you can catch them on small jigs tipped with waxworms or live crickets in 3 to 6 feet of water. The north and west bays are typically the first to warm, so start there if the water temperature is still in the 50s.

Pike are active the same window. They follow the panfish into the shallows and hunt the weed edges. Throw 3- to 4-inch soft plastics or small spinnerbaits along the transition from open water into cabbage beds. Early morning produces better than midday, and overcast days often outfish sunny ones because pike are less spooky in low light.

By mid-May, crappie spawn in slightly deeper water—6 to 10 feet—and they're easier to locate than bluegill because they school tighter. A small jig-and-minnow combo worked slowly along the deeper weed lines will produce steady action. This period lasts through early June, after which the weed growth becomes so thick that panfish fishing shifts to early morning only.

Summer: early morning and the deeper basins

By July, the weeds have taken over most of the shallow water. Bluegill and crappie are still there, but they're deeper in the vegetation and less aggressive in the heat. Fish the first hour after sunrise, when the water is coolest and fish are most active. Dock fishing also works well in summer—bluegill hang around structure, and a small jig lowered next to a dock will often draw strikes.

The deeper basins between the connected sections of the lake become more important in midsummer. These holes rarely exceed 18 feet, but they're 4 to 6 feet deeper than the surrounding flats, and pike and larger crappie use them as daytime refuges. If you have a depth finder, mark these spots in spring and return to them in July and August.

Pike fishing remains decent through summer if you focus on low-light periods. Early morning and the hour before sunset are your best windows. Work the weed edges with soft plastics or live shiners if you want to target larger fish.

Fall and winter patterns

September and October bring cooler water and a return to more consistent daytime fishing. Panfish move back into shallower water as the weeds begin to die back, and bluegill and crappie are more aggressive. This is often the best time to catch numbers of panfish on Rainbow—the water is cool, the weeds are thinning, and fish are feeding hard before winter.

Pike fishing peaks again in fall as they prepare for winter. The same weed edges and basin transitions that worked in spring work now, and you'll often find larger fish in the 24- to 30-inch range moving through the shallows in October.

Winter ice fishing on Rainbow is popular for panfish. The shallow depth means the ice forms quickly and safely, and bluegill and crappie remain active under the ice. Tip-ups and small jigging spoons work well. Pike are present but less predictable under the ice than panfish, though they're still caught by anglers working live shiners in the deeper basins.

Tackle and technique for Rainbow's weeds

Bring heavier line than you might for other panfish lakes. Eight-pound test is a reasonable minimum for bluegill and crappie here, because you'll be working close to vegetation and need the backbone to pull fish away from snags. For pike, 10- to 12-pound test is standard.

Small jigs—1/32 to 1/16 ounce—work best for panfish. Pair them with live bait (waxworms, crickets, small minnows) or soft plastics. For pike, move up to 1/4- to 3/8-ounce jigs or small spinnerbaits. Topwater lures can be effective early in the morning when pike are hunting in the shallows, but they're also prone to fouling on weeds.

A weed rake or similar tool to clear vegetation from your line is not optional on Rainbow. Keep one in the boat and use it often. The weeds will slow you down, but they're also what makes the lake productive.

When to fish and what to expect

Early morning is consistently the most productive time on Rainbow, especially in summer. The first two hours after sunrise produce more strikes than the rest of the day combined. Evening fishing (the last hour before sunset) is your second-best window, particularly for pike.

Midday in summer is slow. Water temperature climbs, fish move deeper or tighter into the weeds, and you'll spend more time casting than catching. If you're on the water at midday, focus on the deeper basins and work slowly.

Wind can make Rainbow choppy quickly because it's shallow and exposed. A 10-knot wind is manageable; 15 knots or more makes boat control difficult and fishing unproductive. Check the forecast before you launch, and be prepared to leave early if the wind picks up.

Regulations and seasons

Rainbow Lake follows Wisconsin's statewide panfish and pike seasons. Panfish (bluegill and crappie) have no closed season and no size or bag limits in most of Wisconsin, though you should check the current Wisconsin Department of Natural Resources regulations before you fish—rules do change. Pike have a catch-and-release season in winter (typically January through March) and an open season the rest of the year with a 24-inch minimum size and a daily bag limit.

A Wisconsin fishing license is required for anyone 16 and older. You can purchase a daily or annual license through the DNR website or at most bait shops in Waupaca.

Frequently Asked Questions

Is Rainbow Lake good for beginners?

Yes. The shallow water and abundant panfish make it forgiving for new anglers, and the public launch is easy to use. The main challenge is the weeds—they require patience and a willingness to clear your line often—but that's a learning experience, not a barrier.

Can I fish Rainbow Lake from shore?

Limited shore access exists near the launch area, but a boat is much more productive. The best fishing is in the weed beds and deeper basins, which are difficult to reach from shore. If you don't have a boat, ask at the launch about rental options.

What's the best time of year to visit?

Late April through May is excellent for pike and panfish, and September through October is often the best for panfish numbers. Summer is productive if you fish early morning, but midday is slow. Winter ice fishing is popular and productive for panfish.

Do I need a fish finder on Rainbow Lake?

A fish finder helps you locate the deeper basins and weed transitions, but it's not essential. Many anglers fish Rainbow successfully with just a map and local knowledge. If you have one, use it to mark the deeper holes in spring for reference in summer.

What size pike does Rainbow Lake hold?

Most pike run 18 to 24 inches. Fish in the 26- to 30-inch range are caught regularly, especially in fall and spring. Trophy pike (over 36 inches) are possible but uncommon. The shallow, weedy character of the lake favors numbers over size.