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240-acre reservoir near Olney. Lower pool of the Olney-Cooper system near Olney (Archer County). NOT the larger Cooper Lake/Jim Chapman; TWDB 2014 survey. The lake tops out around 28 ft. The depth chart comes from Texas Water Development Board bathymetric survey data, so the contours are survey-derived rather than computer-modeled. The season-by-season read for each species follows, from the map's own numbers.
Traced from the shoreline, Lake Cooper (Olney) runs 240 acres with 4.9 miles of edge. The 2.3 development index tells the story — a convoluted bank whose fishable edge far outruns the acreage. The shallow band under 15 ft claims about 53% of the surface — that's where the groceries are. The basin spans about 1.3 mi end to end and 0.8 mi across at its widest. You'll find it in Archer County. The nearest mapped water is Lake Olney, 1 mi to the south.
In spring, largemouth bass run shallow here, mostly 2 to 10 ft. Midsummer fish sit out in 8 to 20 ft before dropping to 8 to 28 ft for winter. Spring largemouth bass concentrate at Shallow bay flat, a prime-rated weed flat around 3 ft. Fish it in early morning and the evening and you'll meet the bite. You won't need more than a texas-rigged 10" worm or a deep-diving crankbait 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 | 2 to 10 ft | dawn & dusk | Shallow bay flat (3 ft) | Spinnerbait, Chatterbait |
| Summer | 8 to 20 ft | dawn & dusk | Break off the point (16 ft) | Texas-rigged 10" worm, Deep-diving crankbait |
| Fall | 4 to 15 ft | midday & dawn | Main-lake point (6 ft) | Squarebill crankbait (shad), Spinnerbait |
| Winter | 8 to 28 ft chart-limited; documented 15 to 35 ft | midday | Break off the point (16 ft) | Blade bait, Jigging spoon |
In spring, channel catfish run shallow here, mostly 3 to 12 ft. Midsummer fish sit out in 8 to 25 ft before dropping to 8 to 28 ft for winter. Winter channel catfish concentrate at Deep basin, a prime-rated deep basin around 27 ft. Fish it in after dark and the evening and you'll meet the bite.
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 | Shallow bay flat (3 ft) | |
| Summer | 8 to 25 ft | night & dusk | Deep basin (27 ft) | |
| Fall | 8 to 28 ft chart-limited; documented 10 to 30 ft | dusk | Deep basin (27 ft) | |
| Winter | 8 to 28 ft chart-limited; documented 20 to 40 ft | midday | Deep basin (27 ft) |
The spring pattern is a shallow one: bluegill in 1 to 6 ft. Midsummer fish sit out in 4 to 15 ft before dropping to 10 to 25 ft for winter. The spot to know is Shallow bay flat, a weed flat in about 3 ft of water that rates prime for bluegill in spring. Plan around early morning and the evening in the warm months. Summer baits: a small sponge spider (fly) or a micro tube jig gets it done.
| Season | Depth | Best window | Start at | Go-to baits |
|---|---|---|---|---|
| Spring | 1 to 6 ft | midday & dusk | Shallow bay flat (3 ft) | 1/32 oz jig + micro plastic, Tiny popper (evenings) |
| Summer | 4 to 15 ft | dawn & dusk | Shallow bay flat (3 ft) | Small sponge spider (fly), Micro tube jig |
| Fall | 6 to 18 ft | midday | Break off the point (16 ft) | Micro jig + waxworm, Small spoon tipped |
| Winter | 10 to 25 ft | midday | Deep basin (27 ft) | Tiny spoon |
Count 6 structure marks on this chart. The deepest, Deep basin, sits near 27 ft.
Season dates, license requirements, and size and bag limits for Texas waters are set by the Texas Parks & Wildlife — and special regulations can apply to Lake Cooper (Olney) specifically, so confirm the current rules before you fish.
Check the official Texas fishing regulations →
Lake Cooper (Olney) is about 28 ft (9 m) deep at its deepest point. The depth chart comes from Texas Water Development Board bathymetric survey data, so the contours are survey-derived rather than computer-modeled.
Anglers target largemouth bass, channel catfish, bluegill on Lake Cooper (Olney).
Shallow bay flat is the top-rated area: a weed flat in about 3 ft of water that rates prime for largemouth bass in spring. The interactive chart above rates every spot for each species and season.
For largemouth bass, the summer bite is best in early morning and the evening. 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 Cooper (Olney) is regulated by the Texas Parks & Wildlife. Check the official Texas regulations for current license requirements, season dates, and size and bag limits — special regulations can apply to this specific water.
Lake Olney 1 mi · Lake Kickapoo 14 mi · Lake Graham 21 mi · Diversion Lake 26 mi · Lake Bryson 28 mi · Lake Arrowhead 29 mi · Lake Wichita 30 mi · Lake Kemp 34 mi · Millers Creek Reservoir 35 mi · North Fork Buffalo Creek Reservoir 39 mi · Possum Kingdom Lake 40 mi · Lost Creek Reservoir 40 mi
See how Lake Cooper (Olney) stacks up: best largemouth bass lakes in Texas · best bluegill lakes in Texas · best channel catfish lakes in Texas
Browse all Texas fishing maps. See every water on DepthScout. Depth data: Texas Water Development Board, Hydrographic surveys. 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.