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4,643-acre lake near Perth and Kinross. The lake tops out around 440 ft. The depth chart comes from published agency bathymetric survey data, so the contours are survey-derived rather than computer-modeled. The depth data here comes from Murray & Pullar's Scottish loch survey of 1902, digitized from the bathymetric atlas published in 1910. Here is how the season plays out for each species, straight from the data behind the map.
Drawn out, this is 4,633 acres of water rimmed by 23.3 miles of bank. With a shoreline index of 2.4, this water is all arms and coves — edge habitat well beyond its acreage. Roughly 16% of the water is 15 ft or less, the band where the food chain lives. The basin spans about 9.9 mi end to end and 1.3 mi across at its widest. The water lies in Perth and Kinross. Closest neighbour on DepthScout: Loch Eigheach, 8 mi west of here.
Early season brown trout use the shallows, holding in 3 to 25 ft. Summer is a 25 to 60 ft game here, winter a 5 to 35 ft one. The chart's best answer is Sharp break — drop-off, 36 ft, prime for summer. Best bite is after dark and early morning. Tie on a spoon at the thermocline or a deep stickbait (night) and you're in the game.
| Season | Depth | Best window | Start at | Go-to baits |
|---|---|---|---|---|
| Spring | 3 to 25 ft | dawn & dusk | Main-lake point (17 ft) | Stickbait off planer boards (shallow), Small spoon along mud lines |
| Summer | 25 to 60 ft | night & dawn | Sharp break (36 ft) | Spoon at the thermocline, Deep stickbait (night) |
| Fall | 5 to 30 ft | dusk & dawn | Main-lake point (17 ft) | Jerkbait over gravel, Casting spoon |
| Winter | 5 to 35 ft | dawn | Sharp break (36 ft) | Jigging spoon, Small stickbait (slow) |
Spring puts european perch in skinny water — 3 to 12 ft is the zone. Warm water sends them out to 8 to 28 ft; cold water stacks them in 12 to 33 ft. Shallow bay flat is the standout, a feeding flat at roughly 6 ft, rated prime for spring european perch. Plan around early morning in the warm months. A drop-shot micro plastics or a small crankbait (perch pattern) covers the summer program.
| Season | Depth | Best window | Start at | Go-to baits |
|---|---|---|---|---|
| Spring | 3 to 12 ft | midday & dawn | Shallow bay flat (6 ft) | Small jig + curly tail, Inline spinner #1-2 |
| Summer | 8 to 28 ft | dawn | Offshore hump (14 ft) | Drop-shot micro plastics, Small crankbait (perch pattern) |
| Fall | 10 to 33 ft | midday | Offshore hump (14 ft) | Jigging spoon (small), Drop-shot on deep flats |
| Winter | 12 to 33 ft | midday & dawn | Offshore hump (14 ft) | Tungsten jig + maggots, Small balance jig |
Spring puts northern pike in skinny water — 2 to 8 ft is the zone. As the season builds they drop to 8 to 20 ft, wintering in 5 to 15 ft. Spring northern pike concentrate at Shallow bay flat, a prime-rated feeding flat around 6 ft. Warm-month bites cluster around early morning and the evening. A bucktail or a weedless spoon over cabbage covers the summer program.
| Season | Depth | Best window | Start at | Go-to baits |
|---|---|---|---|---|
| Spring | 2 to 8 ft | midday & dawn | Shallow bay flat (6 ft) | #5 inline spinner, Spoon (red/white) |
| Summer | 8 to 20 ft | dawn & dusk | Main-lake point (17 ft) | Bucktail, Weedless spoon over cabbage |
| Fall | 6 to 18 ft | midday & dawn | Main-lake point (17 ft) | Big rubber (Bull Dawg style), Husky-style jerkbait |
| Winter | 5 to 15 ft | midday | Shallow bay flat (6 ft) | Tip-ups, Large jigging spoon |
When the water first warms, arctic char slide up into 4 to 15 ft. By summer they slide out to 20 to 60 ft, and by winter most fish are in 10 to 40 ft. If you only fish one area, make it Offshore hump: an offshore hump around 14 ft that scores prime in winter. In summer the feeding windows fall in early morning. Keep a jigging spoon vertical or a tube jig (smelt) rigged through the warm months.
| Season | Depth | Best window | Start at | Go-to baits |
|---|---|---|---|---|
| Spring | 4 to 15 ft | midday & dawn | Shallow bay flat (6 ft) | Small casting spoon (silver/orange), Jerkbait (small) |
| Summer | 20 to 60 ft | dawn | Sharp break (36 ft) | Jigging spoon vertical, Tube jig (smelt) |
| Fall | 8 to 30 ft | midday & dusk | Offshore hump (14 ft) | Casting spoon (orange/gold), Beadhead streamer |
| Winter | 10 to 40 ft | midday & dawn | Offshore hump (14 ft) | Jigging spoon (glow/silver), Tungsten jig + plastic |
Count 11 structure marks on this chart. The deepest, Deep basin, sits near 440 ft.
Loch Rannoch is about 440 ft (134 m) deep at its deepest point. The depth data here comes from Murray & Pullar's Scottish loch survey of 1902, digitized from the bathymetric atlas published in 1910.
Anglers target brown trout, european perch, northern pike, arctic char on Loch Rannoch. 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.
Sharp break is the top-rated area: a drop-off in about 36 ft of water that rates prime for brown trout in summer. Open the map above to see every rated spot for each species and season.
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.
Loch Eigheach 8 mi · Loch Garry 8 mi · Lochan Sròn Smeur 8 mi · Loch Con 9 mi · Loch Ericht 10 mi · Lochan nan Cat 10 mi · Loch Laidon 12 mi · Loch Tay 13 mi · Loch Pattack 13 mi · Loch Ossian 13 mi · Loch Ghuilbinn 15 mi · Loch Bhac 15 mi
See how Loch Rannoch stacks up: best northern pike lakes in United Kingdom · best european perch lakes in United Kingdom · best brown trout lakes in United Kingdom · best arctic char lakes in United Kingdom
More water nearby: Perth and Kinross fishing maps (40 charts). Browse all United Kingdom fishing maps. See every water on DepthScout. Bathymetry: published agency survey data. 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.