What You'll Find at Boom Lake

Boom Lake is a shallow, weedy basin about 15 minutes south of Rhinelander that holds walleye, northern pike, and panfish in roughly equal measure. The lake runs about 1,100 acres and rarely exceeds 30 feet deep—most of it sits between 8 and 20 feet. That shallow character means the weed growth is heavy and the water warms quickly in summer, which makes spring and fall the most reliable seasons for walleye. Pike thrive here year-round because they hunt the weed edges, and bluegill and crappie populations are strong enough that you can spend a full day on panfish alone if that's your target.

The lake has a public boat launch on the south end, and the shoreline is a mix of residential property and undeveloped forest. Access is straightforward, but the shallow depth and dense vegetation mean you need to fish it differently than you would a deep glacial lake. Trolling works, but casting to structure and working the weed lines will put more fish in the boat.

Key Takeaways

  • Boom Lake's shallow depth and heavy weed growth make it best in spring (April–May) and fall (September–October) when walleye move into predictable feeding zones.
  • Northern pike are present year-round and respond well to casting large swimbaits or spinnerbaits along weed edges and drop-offs.
  • Panfish—bluegill and crappie—are abundant and provide consistent action, especially in deeper holes and around submerged wood.
  • The public launch is on the south shore; arrive early on weekends because parking fills quickly during summer.
  • Summer fishing is slower due to warm water and heavy algae; focus on early morning, late evening, or deeper weed pockets if you fish mid-day.

Spring Walleye: April Through May

Spring is when Boom Lake walleye are most predictable. As the water warms from 40 to 55 degrees, walleye move from the deepest basin into the shallower flats and weed edges to feed. Focus on the south and east shorelines where the lake bottom transitions from sand to weeds—that edge is where walleye hunt in April and early May. Jigs tipped with live minnows or crawlers work best; cast parallel to the weed line rather than into the thick stuff, and work the jig slowly along the bottom.

Early morning and late evening are most productive, but spring walleye will bite through midday if the sky is overcast. Water clarity is usually good in spring before the algae bloom, so you can see structure and adjust your casting accordingly. Expect fish in 6 to 12 feet of water during this window.

Summer Challenges and How to Fish Them

By late June, Boom Lake warms into the low 70s and the weed growth becomes so thick that fishing becomes difficult. Algae blooms are common, and walleye retreat to the deepest holes or suspend in the water column where the weeds thin out. If you fish summer, focus on the basin in the center of the lake—it's the deepest water available—and fish early (before 8 a.m.) or after sunset when the water is cooler and walleye are more active.

Pike and panfish remain catchable all summer. Pike will hunt the weed edges even in heat, and panfish hold in deeper pockets and around submerged wood. If you're targeting panfish, look for the few areas where the bottom drops to 15+ feet; crappie especially will suspend over deep water in summer. Bluegill stay shallower but move into shade under docks and overhanging trees.

Fall Bite: September and October

Fall is the second-best season on Boom Lake. As water temperature drops from 65 to 50 degrees, walleye move back into the shallows and feed aggressively to build reserves for winter. The weed growth dies back, which opens up the lake and makes it easier to cover water. Jigs and live bait work, but so do crankbaits and spinners—walleye are less cautious in fall and will chase moving baits.

Pike fishing is excellent in fall. The cooler water makes them more active, and the dying weeds concentrate baitfish along the remaining green edges. Large swimbaits (4 to 6 inches) and spinnerbaits in white or chartreuse are reliable. Panfish remain strong through October, and the cooler water actually improves their bite compared to summer.

Pike Fishing Year-Round

Northern pike are present on Boom Lake in every season and respond to the same basic approach: cast large baits or lures to structure and work them with confidence. Weed edges, the transition from shallow flats to deeper water, and any submerged wood are pike territory. In spring and fall, pike hunt the shallows; in summer, they move to deeper weed pockets and the edges of the basin.

Live baitfish (shiners or herring in the 4- to 6-inch range) work well, as do swimbaits and large spinnerbaits. Pike on Boom Lake average 24 to 28 inches, with occasional fish in the 30-plus range. The lake is not known for trophy pike, but it holds enough quality fish to make pike fishing worthwhile if walleye are slow.

Panfish: Bluegill and Crappie

Bluegill and crappie are the most consistent fish on Boom Lake. Bluegill are shallow and abundant—you can find them around docks, weed edges, and fallen trees in 4 to 10 feet of water. Small jigs (1/32 to 1/16 ounce) tipped with waxworms or small minnows work, as do tiny spinners and popping bugs if you fly fish. Bluegill bite all season, though they're most active in spring and fall.

Crappie are deeper and more seasonal. In spring, they move into 8 to 15 feet of water to spawn; in summer, they suspend over the basin in 15 to 25 feet; in fall, they move back to shallower structure. Vertical jigging over deep water with small minnows is the most effective crappie technique on Boom Lake. A depth finder is helpful because crappie suspend, and you need to know where the fish are holding.

Boat Launch and Access

The public boat launch is located on the south shore of Boom Lake and is maintained by Oneida County. The launch has a paved ramp, parking for roughly 20 vehicles, and a small pier. Arrive early on summer weekends—parking fills by 9 a.m. on Saturdays and Sundays. There is no fee to launch, and the facility is open year-round, though winter access depends on snow removal.

The lake is surrounded by a mix of private residential property and public forest. Respect posted property lines, and do not beach on private land. The shoreline is accessible by water, and there are a few undeveloped areas where you can pull up briefly, but most of the lake is developed.

Frequently Asked Questions

What's the best time of year to fish Boom Lake?

Spring (April–May) and fall (September–October) are most productive for walleye. Summer is slower due to warm water and heavy weeds, but pike and panfish remain catchable. Winter fishing is possible but requires ice-fishing techniques and knowledge of where fish suspend under the ice.

Do I need a guide to fish Boom Lake?

No. The lake is small enough and well-developed enough that you can fish it successfully on your own. A depth finder helps, especially for crappie and summer walleye, but it's not required. If you're new to the area, a half-day guide can teach you the weed lines and structure quickly.

Can I fish from shore?

Yes, but shore access is limited because most of the shoreline is private. The public launch area has a small pier where you can fish, and there are a few undeveloped spots along the south and east shores. A boat gives you much more flexibility and access to the deeper structure where walleye and crappie hold.

What size fish should I expect?

Walleye average 16 to 20 inches, with occasional fish to 24 inches. Pike run 24 to 28 inches on average. Bluegill are typically 7 to 9 inches, and crappie range from 9 to 12 inches. The lake is not known for trophy fish, but it holds solid numbers of quality panfish and pike.

Is Boom Lake good for beginners?

Yes. The lake is small, the public launch is easy to use, and panfish are abundant and forgiving. Walleye fishing requires more skill and knowledge of seasonal patterns, but pike and panfish provide consistent action for anglers learning the basics.