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5-acre lake near Cumbria. The lake tops out around 12 ft. The contours are modeled from the water's real shoreline and maximum depth. Treat them as a rough guide, and never use them for navigation. What follows comes from the same scoring engine that paints the spots above.
The drawn water covers 5 acres wrapped in 0.4 miles of bank. Nearly circular (index 1.3), so the story is the bottom, not the bank. Every acre of it sits shallower than ~15 ft: one big littoral zone, cover and forage throughout. Cumbria claims this one. Blea Tarn sits 1 mi east — the closest neighbouring chart.
The spring pattern is a shallow one: brown trout in 1 to 12 ft. The depth story barely changes: 4 to 12 ft through summer, 2 to 12 ft in winter. Top water on the chart: Shoreline break, a drop-off in the 5 ft range, prime in summer. Time it for after dark and early morning. Summer baits: a spoon at the thermocline or a deep stickbait (night) gets it done.
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 | 1 to 12 ft chart-limited; documented 3 to 25 ft | dawn & dusk | Shoreline break (5 ft) | Stickbait off planer boards (shallow), Small spoon along mud lines |
| Summer | 4 to 12 ft chart-limited; documented 25 to 60 ft | night & dawn | Shoreline break (5 ft) | Spoon at the thermocline, Deep stickbait (night) |
| Fall | 2 to 12 ft chart-limited; documented 5 to 30 ft | dusk & dawn | Shoreline break (5 ft) | Jerkbait over gravel, Casting spoon |
| Winter | 2 to 12 ft chart-limited; documented 5 to 35 ft | dawn | Shoreline break (5 ft) | Jigging spoon, Small stickbait (slow) |
Come spring, look for european perch tight to the bank in 3 to 12 ft. Through summer count on 3 to 12 ft; the winter hold is 4 to 12 ft. Start at Shallow bay flat. It's a weed flat holding about 3 ft of water and rates prime come spring. Prime time lands in early morning. A drop-shot micro plastics or a small crankbait (perch pattern) 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 | midday & dawn | Shallow bay flat (3 ft) | Small jig + curly tail, Inline spinner #1-2 |
| Summer | 3 to 12 ft chart-limited; documented 8 to 28 ft | dawn | Deep basin (10 ft) | Drop-shot micro plastics, Small crankbait (perch pattern) |
| Fall | 4 to 12 ft chart-limited; documented 10 to 33 ft | midday | Deep basin (10 ft) | Jigging spoon (small), Drop-shot on deep flats |
| Winter | 4 to 12 ft chart-limited; documented 12 to 33 ft | midday & dawn | Deep basin (10 ft) | Tungsten jig + maggots, Small balance jig |
Early season northern pike use the shallows, holding in 2 to 8 ft. Expect a summer slide to 4 to 12 ft, then a winter hold in 4 to 12 ft. Put Shallow bay flat first on the milk run — a weed flat near 3 ft that grades prime for spring. In summer the feeding windows fall in early morning and the evening. Tie on a bucktail or a weedless spoon over cabbage and you're in the game.
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 | Shallow bay flat (3 ft) | #5 inline spinner, Spoon (red/white) |
| Summer | 4 to 12 ft chart-limited; documented 8 to 20 ft | dawn & dusk | Shoreline break (5 ft) | Bucktail, Weedless spoon over cabbage |
| Fall | 4 to 12 ft chart-limited; documented 6 to 18 ft | midday & dawn | Shoreline break (5 ft) | Big rubber (Bull Dawg style), Husky-style jerkbait |
| Winter | 4 to 12 ft chart-limited; documented 5 to 15 ft | midday | Shallow bay flat (3 ft) | Tip-ups, Large jigging spoon |
Structure-wise the chart holds 3 features, led in depth by Deep basin at roughly 10 ft.
Dock Tarn is about 12 ft (4 m) deep at its deepest point. The contours here are modeled from the water's real shape and maximum depth, so treat them as a rough guide.
Anglers target brown trout, european perch, northern pike on Dock Tarn. This isn't a survey of the water — none is published for it — but an informed estimate from the species common to the region, narrowed by this water's depth, size and each species' range.
Shallow bay flat is the top-rated area: a weed flat in about 3 ft of water that rates prime for european perch in spring. Every other rated spot, per species and season, is on the map above.
For brown trout, the summer bite is best in after dark 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.
Blea Tarn 1 mi · Thirlmere 3 mi · Derwent Water 4 mi · Red Tarn, Helvellyn 5 mi · Grisedale Tarn 5 mi · Buttermere 6 mi · Grasmere 6 mi · Elter Water or Elterwater 7 mi · Scoat Tarn 8 mi · Low Tarn 8 mi · Crummock Water 8 mi · Brothers Water 8 mi
See how Dock Tarn stacks up: best northern pike lakes in United Kingdom · best european perch lakes in United Kingdom · best brown trout lakes in United Kingdom
More water nearby: Cumbria fishing maps (32 charts). Browse all United Kingdom fishing maps. See every water on DepthScout. 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.