Northwoods SLOP!
Slop. Junkweed. Floating weed mats. Pad fields.
Several northern largemouth waters contain these plant life overgrowths. As the summer months proceed on, plant species sprout and flourish, fed by daily sunshine and nutrients seeping into the system. Through photosynthesis, they continue to grow as summer progresses.
Even though slop fields and weed jungles greatly intimidate anglers for their fishing and navigational difficulties, focusing on these lake regions is integral for summertime largemouth bass success.
Across northern lakes, largemouths tend to seek the deepest edges and weed cover available, but where dense shallow cover is available, fish will also gravitate to these lake areas as well. Largemouths thrive in slop, utilizing it for their living quarters and prolific feeding. In these locations, largemouths frequently hunt for small prey that includes an assortment of unsuspecting juvenile panfish, insects, and amphibians. Most ambushing takes place near-surface. This heavy feeding delivers some of the most explosive, fun fishing of summer.
From shallow sloughs, swampland, and backwaters to the slop-choked bays and littoral zones of natural lakes, slop areas can offer undisturbed, less-pressured populations of big bass.
Northwoods Slop
Whether guiding or leisure fishing, we’re always looking for the best available and most unique weed habitat and shallow cover differing from the rest of the fishery. Across many Wisconsin lake systems, some of our best summer season fishing locations are around impenetrable, heavily vegetated areas.
Depending on the lake type (drainage or seepage), vegetation can range in sparse isolated patches to vast overgrowing expanses amassing several acres. Whatever the size, you can bet on largemouths frequenting them. Their habitats can be thick and rich with diverse emergent and submergent plant species. Another characteristic of them can be the abundance of timber and wood cover, and the element of protection from fishing pressure and the rest of the lake or river system. Other good water includes sparse grass, lily pads, overhanging trees and timber, and the dead ends of coves where emergent vegetation and debris has accumulated.
Habitats are very shallow, often 5 ft. or less. Largemouths in the north will only use them seasonally, with late spring through summer being the timeline. The best areas will contain edges, deeper holes, and available open pockets and casting lanes. And there is no shortage of fish cover, plant life, and submerged wood either.
Too much dense cover creates challenging access and fishing. Isolated spots and openings have the best attraction. Largemouths love the edges everywhere they go. Slop offering outside or inside edges are always a benefit, but know how its diverse plant varieties benefit largemouths. An overabundance of lily pads, eel grass, and cattails can choke out the area, rendering it useless to largemouths. Identifying potential fish-holding targets will increase your catch rates.
Of all their relevant features, depth defines whether it’s worth fishing or not. Slop areas I favor will have distinct edges that are located closer to better-oxygenated deeper water, and access to the main lake. In these areas, 3-to-5-foot depths could be considered deep. Additional spots could be isolated and near-shore, such as shade spots tight to shore.
Depending on your region and lake’s bottom composition, several dozen plant species could be prevalent. In some slop areas, a single species could dominate and choke out the others.
Examine your baits frequently when they get fouled. Here in Wisconsin, top slop plants are lily pads (white water lily and spatterdock), northern milfoil, eel grass, broadleaf pondweed, duckweed, bullrush, and wild rice. Each one finds its home and anchor point around the lake.
Across the lake’s littoral zone and its shallow bays, plant growth often reaches the surface, becoming emergent. This is most common on the most fertile mesotrophic and eutrophic waters producing big bass.
Speaking of slop waters, some of these lakes will remain clear(er), while others develop greenish tints and blooms in summer-time, or have darker acidic brown water. I often find better quality fishing and most action on waters with a slight bloom – as their bass remain shallow under most conditions, don’t spook as easily, and relocate less frequently.
Locating slop can be accomplished easily through Google Earth. Today’s overhead satellite imagery of lakes enables anglers to see and find what each one offers. All you’ve got to do is look for green blotches – looking closely at bays, near-shore areas, channels, and backwaters. Once the spots are identified, align the Google Earth imagery with your lake charts and contour maps. This will aid in navigating to them, as well as potentially determining their depth and fishability. Oftentimes, the best method of finding slop is simply time on the water. Taking mental notes of emergent vegetation locations during spring before they fully bloom can be an important discovery for what lies ahead in summertime.
Google Earth
Locating slop can be accomplished easily through Google Earth. Today’s overhead satellite imagery of lakes enables anglers to see and find what each one offers. All you’ve got to do is look for green blotches – looking closely at bays, near-shore areas, channels, and backwaters.
Getting Your Boat into It
Slop fishing usually leads you and your boat into some pretty awful places that are generally inaccessible with the outboard motor and common trolling motor setups.
The greatest benefit to fishing them is difficulty of navigation and access to potentially less-pressured fish. Without the right watercraft and high-powered trolling motor, the most expansive slop fields can be very difficult to penetrate through.
Carefully approaching and entering these areas is important, so not to stir up bottom sediments and leave a cloud trail from the outboard and trolling motor. While 24 and 36-volt trolling motor setups can break through thick stuff, bass will be alerted, halting their activity. If you must, raise and trim the troller up high so the blades propel you only inches below the surface. Otherwise equipping with a push pole, or getting into these areas with kayak, are the quietest modes of entry. This stealth will help conceal you.
When largemouths elect to stay shallow during the daytime, be observant of dragonflies, reptiles and amphibians. Listen also for bluegills and sunfish popping insects loudly from the surface.
Most anglers tend to wait until summer before fishing these areas. However, largemouths begin visiting these lake locations much sooner in the year for spring feeding and spawning. Do not neglect the opportunities to fish these areas from ice-out through early summer, as bigger and heavier largemouths will be lurking. Depending on region, many slop areas could already be sprouting with some emergent vegetation by late May.
By early autumn, largemouths will vacate slop. Come turnover, it’ll all be devoid of life. Revisit the same areas again next year.



















