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Rating depth structure for muskellunge.
Recent public catches load as you reach this section.
3,225-acre reservoir near Portersville. The centerpiece of Moraine State Park north of Pittsburgh, a shallow, fertile lake famous for muskie and largemouth. The lake tops out around 31 ft. The depth chart comes from Pennsylvania Department of Conservation and Natural Resources bathymetric survey data, so the contours are survey-derived rather than computer-modeled. The rest of this page walks each species through its year, using the map's own scoring.
The outline encloses 3,126 acres, worked by 47.8 miles of shoreline — 2 islands included. With a shoreline index of 6.1, this water is all arms and coves — edge habitat well beyond its acreage. The shallow band under 15 ft claims about 76% of the surface — that's where the groceries are. The basin spans about 7 mi end to end and 4 mi across at its widest. It sits in Butler County. Shenango River Lake sits 31 mi northwest — the closest neighbouring chart.
Come spring, look for muskellunge tight to the bank in 3 to 12 ft. Expect a summer slide to 8 to 25 ft, then a winter hold in 9 to 31 ft. Prime time lands in the evening and early morning. A double-10 bucktail or a topwater (walk-the-dog / creeper) is the honest summer answer here.
Depth note: when a documented seasonal range extends below this chart, the table shows the deepest mapped working water, not a verified holding depth.
| Season | Depth | Best window | Start at | Go-to baits |
|---|---|---|---|---|
| Spring | 3 to 12 ft | dusk | open water | Smaller bucktail (#8 blades), 6" glide bait |
| Summer | 8 to 25 ft | dusk & dawn | open water | Double-10 bucktail, Topwater (walk-the-dog / creeper) |
| Fall | 8 to 30 ft | midday & dusk | open water | Big rubber (Bull Dawg style), 10"+ glide bait |
| Winter | 9 to 31 ft chart-limited; documented 15 to 35 ft | midday | open water | Large rubber, crawled slow |
Come spring, look for largemouth bass tight to the bank in 2 to 10 ft. They move out to 8 to 20 ft in summer and finish the year down in 9 to 31 ft. Best bite is early morning and the evening. A texas-rigged 10" worm or a deep-diving crankbait is the honest summer answer here.
Depth note: when a documented seasonal range extends below this chart, the table shows the deepest mapped working water, not a verified holding depth.
| Season | Depth | Best window | Start at | Go-to baits |
|---|---|---|---|---|
| Spring | 2 to 10 ft | dawn & dusk | open water | Spinnerbait, Chatterbait |
| Summer | 8 to 20 ft | dawn & dusk | open water | Texas-rigged 10" worm, Deep-diving crankbait |
| Fall | 4 to 15 ft | midday & dawn | open water | Squarebill crankbait (shad), Spinnerbait |
| Winter | 9 to 31 ft chart-limited; documented 15 to 35 ft | midday | open water | Blade bait, Jigging spoon |
In spring, walleye run shallow here, mostly 4 to 15 ft. Midsummer fish sit out in 9 to 31 ft before dropping to 9 to 31 ft for winter. Fish it in the evening and early morning and you'll meet the bite. You won't need more than a crawler harness on bottom bouncer or a deep crankbait (trolled) most summer days.
Depth note: when a documented seasonal range extends below this chart, the table shows the deepest mapped working water, not a verified holding depth.
| Season | Depth | Best window | Start at | Go-to baits |
|---|---|---|---|---|
| Spring | 4 to 15 ft | dusk & dawn | open water | 1/8 oz jig + minnow, Hair jig |
| Summer | 9 to 31 ft chart-limited; documented 15 to 35 ft | dusk & dawn | open water | Crawler harness on bottom bouncer, Deep crankbait (trolled) |
| Fall | 9 to 31 ft chart-limited; documented 12 to 40 ft | dusk & night | open water | Jigging rap, Jig + big minnow |
| Winter | 9 to 31 ft chart-limited; documented 20 to 40 ft | dusk & dawn | open water | Jigging spoon + minnow head, Rattle bait |
When the water first warms, crappie slide up into 2 to 8 ft. Summer is a 10 to 25 ft game here, winter a 9 to 31 ft one. The feeding windows run early morning and the evening. Keep a jig trolled/spider-rigged or a small crankbait (trolled) rigged through the warm months.
Depth note: when a documented seasonal range extends below this chart, the table shows the deepest mapped working water, not a verified holding depth.
| Season | Depth | Best window | Start at | Go-to baits |
|---|---|---|---|---|
| Spring | 2 to 8 ft | midday & dawn | open water | 1/16 oz jig + tube, Curly-tail grub |
| Summer | 10 to 25 ft | dawn & dusk | open water | Jig trolled/spider-rigged, Small crankbait (trolled) |
| Fall | 8 to 20 ft | dawn | open water | Jig + minnow combo, Small swimbait (1.5-2") |
| Winter | 9 to 31 ft chart-limited; documented 15 to 35 ft | midday | open water | Tungsten jig + soft plastic, Tiny jigging spoon |
Come spring, look for channel catfish tight to the bank in 3 to 12 ft. They move out to 8 to 25 ft in summer and finish the year down in 9 to 31 ft. Best bite is after dark and the evening.
Depth note: when a documented seasonal range extends below this chart, the table shows the deepest mapped working water, not a verified holding depth.
| Season | Depth | Best window | Start at | Go-to baits |
|---|---|---|---|---|
| Spring | 3 to 12 ft | dusk | open water | |
| Summer | 8 to 25 ft | night & dusk | open water | |
| Fall | 10 to 30 ft | dusk | open water | |
| Winter | 9 to 31 ft chart-limited; documented 20 to 40 ft | midday | open water |
When the water first warms, white bass & hybrids slide up into 3 to 15 ft. Summer is a 10 to 30 ft game here, winter a 9 to 31 ft one. The feeding windows run early morning and the evening. Keep a jigging spoon or a topwater (when schooling) rigged through the warm months.
Depth note: when a documented seasonal range extends below this chart, the table shows the deepest mapped working water, not a verified holding depth.
| Season | Depth | Best window | Start at | Go-to baits |
|---|---|---|---|---|
| Spring | 3 to 15 ft | midday & dawn | open water | Rooster tail / inline spinner, Curly-tail jig (white/chartreuse) |
| Summer | 10 to 30 ft | dawn & dusk | open water | Jigging spoon, Topwater (when schooling) |
| Fall | 8 to 25 ft | midday & dawn | open water | Small blade bait, Jigging spoon |
| Winter | 9 to 31 ft chart-limited; documented 20 to 40 ft | midday | open water | Jigging spoon, Blade bait (vertical) |
Count 16 structure marks on this chart. The deepest, Deep basin, sits near 30 ft.
Season dates, license requirements, and size and bag limits for Pennsylvania waters are set by the Pennsylvania Fish & Boat Commission — and special regulations can apply to Lake Arthur specifically, so confirm the current rules before you fish.
Check the official Pennsylvania fishing regulations →
Lake Arthur is about 31 ft (9 m) deep at its deepest point. The depth chart comes from Pennsylvania Department of Conservation and Natural Resources bathymetric survey data, so the contours are survey-derived rather than computer-modeled.
Anglers target muskellunge, largemouth bass, walleye, crappie, channel catfish, white bass & hybrids on Lake Arthur.
For muskellunge, the summer bite is best in the evening and early morning. Each species page section below lists the seasonal windows, and the map shows a live NOW badge when you're inside one.
Fishing on Lake Arthur is regulated by the Pennsylvania Fish & Boat Commission. Check the official Pennsylvania regulations for current license requirements, season dates, and size and bag limits — special regulations can apply to this specific water.
Shenango River Lake 31 mi · Ohio River - New Cumberland Pool 35 mi, OH/WV · Tomlinson Run Lake 39 mi, WV · Highlandtown Lake 42 mi, OH · Guilford Lake 44 mi, OH · Mosquito Creek Lake 47 mi, OH · Conneaut Lake 48 mi · Lake Milton 49 mi, OH · Pymatuning Reservoir 50 mi, OH/PA · Jefferson Lake 51 mi, OH · Berlin Lake 52 mi, OH · Ohio River - Pike Island Pool 52 mi, OH/WV
See how Lake Arthur stacks up: best largemouth bass lakes in Pennsylvania · best walleye lakes in Pennsylvania · best crappie lakes in Pennsylvania · best channel catfish lakes in Pennsylvania
Browse all Pennsylvania fishing maps. See every water on DepthScout. Depth data: Pennsylvania Department of Conservation and Natural Resources, Lake Bathymetry native survey-derived contour polylines. How we build these maps. Fish here with a sonar unit that logs? Send us your depth data and we'll improve this chart, credited to you. For fishing guidance only, never navigation.