Largemouth Bass
The overgrown side of the reservoir is the honey hole. The weedbeds grow in so thick they leave only small weedless pockets, and that's where the better largemouth sit. This is a warmwater marsh built for them — shallow, vegetated, tolerant of the stain and heat that would push other bass out. From the late-June opener onward, largemouth are the fish that define Mountsberg, and they hold in the salad all season long.
← Back to Mountsberg Reservoir conditionsHow it fishes
Largemouth here live and die by the weed. Right after the fourth-Saturday-of-June opener, fish the weedbeds and weedless pockets on the overgrown marsh side, where cover is thickest and the fish are densest.
Through summer the whole reservoir turns into shallow weed flats, and the bite concentrates early and late in the day when the surface cools — spinnerbaits and surface baits worked over the weed tops draw the strikes. Shore access gets choked as the vegetation fills in, so a canoe or kayak working the weed edges reaches water the bank never will.
As the reservoir drops through fall for flood storage, the margins pull back and the fish slide with the retreating weed line. Follow the green, not last month's spot.
Structure
The heavily vegetated side of the reservoir grows in thick enough to leave only small weedless openings — those pockets hold the better fish. (Angler-report detail; the whole-lake shallow-marsh character it sits in is officially documented in the watershed study.)
The reservoir is a large expanse of shallow, open marsh, so weed flats and their edges are the reservoir-wide pattern — best worked by boat along the weed lines once summer vegetation makes the bank tough to fish.
Regulations
This is a summary, not the legal regulation — confirm current rules with the official source before fishing.