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Rating depth structure for rainbow trout.
Recent public catches load as you reach this section.
26-acre stocked lake in the PWS area. ADF&G sonar-surveyed water with stocked rainbow trout and 2 more species. The lake tops out around 23 ft. The depth chart comes from published agency 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.
The outline encloses 26 acres, worked by 1.2 miles of shoreline. A middling shoreline index (1.7) gives it some bays to work without being a maze. Littoral water — the productive band under ~15 ft — makes up 97% of this chart. Figure 0.5 mi of water from one end to the other, 0.2 mi at the beam. Chugach Borough claims this one. If the bite dies, Blueberry Lake is 1 mi to the west.
When the water first warms, rainbow trout slide up into 5 to 20 ft. Summer is a 6 to 23 ft game here, winter a 5 to 23 ft one. The feeding windows run early morning and the evening. Keep a dodger + spoon (deep troll) or a flutter spoon 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 | 5 to 20 ft | dawn & dusk | open water | Inline spinner (silver), Small spoon |
| Summer | 6 to 23 ft chart-limited; documented 8 to 30 ft | dawn & dusk | open water | Dodger + spoon (deep troll), Flutter spoon |
| Fall | 7 to 23 ft chart-limited; documented 10 to 35 ft | dawn & dusk | open water | Casting spoon, Jerkbait over shoals |
| Winter | 5 to 23 ft chart-limited; documented 8 to 40 ft | dawn | open water | Jigging spoon, Tube jig (white) |
Come spring, look for arctic grayling tight to the bank in 2 to 10 ft. They move out to 3 to 15 ft in summer and finish the year down in 7 to 23 ft. Best bite is the evening and early morning. A dry fly (parachute adams, elk hair caddis) or a small inline spinner 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 | midday & dusk | open water | 1/16 oz spinner (silver), Small dry fly (Adams, Griffith's) |
| Summer | 3 to 15 ft | dusk & dawn | open water | Dry fly (parachute Adams, elk hair caddis), Small inline spinner |
| Fall | 6 to 20 ft | midday | open water | Small spoon, Beadhead nymph under indicator |
| Winter | 7 to 23 ft chart-limited; documented 8 to 25 ft | midday & dawn | open water | Tungsten jig + waxworm, Small jigging spoon (gold) |
In spring, arctic char run shallow here, mostly 4 to 15 ft. Midsummer fish sit out in 7 to 23 ft before dropping to 6 to 23 ft for winter. Fish it in early morning and you'll meet the bite. You won't need more than a jigging spoon vertical or a tube jig (smelt) 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 | midday & dawn | open water | Small casting spoon (silver/orange), Jerkbait (small) |
| Summer | 7 to 23 ft chart-limited; documented 20 to 60 ft | dawn | open water | Jigging spoon vertical, Tube jig (smelt) |
| Fall | 6 to 23 ft chart-limited; documented 8 to 30 ft | midday & dusk | open water | Casting spoon (orange/gold), Beadhead streamer |
| Winter | 6 to 23 ft chart-limited; documented 10 to 40 ft | midday & dawn | open water | Jigging spoon (glow/silver), Tungsten jig + plastic |
Season dates, license requirements, and size and bag limits for Alaska waters are set by the Alaska Department of Fish and Game — and special regulations can apply to Thompson Lake specifically, so confirm the current rules before you fish.
Check the official Alaska fishing regulations →
Thompson Lake is about 23 ft (7 m) deep at its deepest point. The depth chart comes from published agency bathymetric survey data, so the contours are survey-derived rather than computer-modeled.
Anglers target rainbow trout, arctic grayling, arctic char on Thompson Lake.
For rainbow trout, 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 Thompson Lake is regulated by the Alaska Department of Fish and Game. Check the official Alaska regulations for current license requirements, season dates, and size and bag limits — special regulations can apply to this specific water.
Blueberry Lake 1 mi · Tonsina Lake 25 mi · Klutina Lake 39 mi · Crosswind Lake 85 mi · Tangle Pond 110 mi · Airstrip Pond 111 mi · Alder Pond 111 mi · Eklutna Lake 114 mi · Slipper (Eska) Lake 115 mi · Paxson Lake 124 mi · Edmonds Lake 125 mi · Mirror Lake 126 mi
See how Thompson Lake stacks up: best rainbow trout lakes in Alaska · best arctic grayling lakes in Alaska · best arctic char lakes in Alaska
Browse all Alaska 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.