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Rating depth structure for brook trout.
Shared by DepthScout anglers. Exact spots stay private, always.
1,626-acre lake near Rainbow Township. The lake tops out around 130 ft. The depth chart comes from published agency bathymetric survey data, so the contours are survey-derived rather than computer-modeled. Species by species, here's what the data says the year looks like.
Drawn out, this is 1,624 acres of water rimmed by 16.2 miles of bank — 10 islands included. That shoreline is heavily fingered (development index 2.9) — bays, points and pockets everywhere, which multiplies the fishable edge. Littoral water — the productive band under ~15 ft — makes up 10% of this chart. Tip to tip the water measures near 4.3 mi with a 1.5-mi widest point. The water lies in Piscataquis County. Closest neighbour on DepthScout: Doughnut Pond, 1 mi south of here.
Come spring, look for arctic char tight to the bank in 4 to 15 ft. Expect a summer slide to 20 to 60 ft, then a winter hold in 10 to 40 ft. Start at Creek inflow. It's an inflow / creek mouth holding about 6 ft of water and rates prime come spring. Prime time lands in early morning. A jigging spoon vertical or a tube jig (smelt) is the honest summer answer here.
| Season | Depth | Best window | Start at | Go-to baits |
|---|---|---|---|---|
| Spring | 4 to 15 ft | midday & dawn | Creek inflow (6 ft) | Small casting spoon (silver/orange), Jerkbait (small) |
| Summer | 20 to 60 ft | dawn | Break off the point (25 ft) | Jigging spoon vertical, Tube jig (smelt) |
| Fall | 8 to 30 ft | midday & dusk | Break off the point (25 ft) | Casting spoon (orange/gold), Beadhead streamer |
| Winter | 10 to 40 ft | midday & dawn | Break off the point (25 ft) | Jigging spoon (glow/silver), Tungsten jig + plastic |
The spring pattern is a shallow one: brook trout in 2 to 15 ft. Midsummer fish sit out in 10 to 30 ft before dropping to 3 to 20 ft for winter. The spot to know is Creek inflow, an inflow / creek mouth in about 6 ft of water that rates prime for brook trout in spring. Plan around early morning and the evening in the warm months. Summer baits: a small spoon fished deep or a trolled lake-clear wobbler + worm gets it done.
| Season | Depth | Best window | Start at | Go-to baits |
|---|---|---|---|---|
| Spring | 2 to 15 ft | dawn & dusk | Creek inflow (6 ft) | Small inline spinner (gold), Tiny spoon |
| Summer | 10 to 30 ft | dawn & dusk | Creek inflow (16 ft) | Small spoon fished deep, Trolled lake-clear wobbler + worm |
| Fall | 2 to 15 ft | midday & dawn | Creek inflow (6 ft) | Small spoon (orange), Spinner |
| Winter | 3 to 20 ft | dawn | Creek inflow (6 ft) | Small jigging spoon, Tungsten jig + plastic |
10 pieces of structure are mapped here — Deep basin, around 115 ft, is the deepest of them.
Season dates, license requirements, and size and bag limits for Maine waters are set by the Maine IFW — and special regulations can apply to Rainbow Lake specifically, so confirm the current rules before you fish.
Check the official Maine fishing regulations →
Rainbow Lake is about 130 ft (40 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 arctic char, brook trout on Rainbow Lake.
Creek inflow is the top-rated area: an inflow / creek mouth in about 6 ft of water that rates prime for brook trout in spring. Every other rated spot, per species and season, is on the map above.
For arctic char, the summer bite is best in 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 Rainbow Lake is regulated by the Maine IFW. Check the official Maine regulations for current license requirements, season dates, and size and bag limits — special regulations can apply to this specific water.
Doughnut Pond 1 mi · Woodman Pond 1 mi · Bear Pond 2 mi · Horserace Ponds 2 mi · Big Beaver Pond 3 mi · Buck Pond 3 mi · Little Minister Pond 4 mi · Daisey Pond 4 mi · Big Minister Pond 4 mi · Little Hurd Pond 4 mi · Nahmakanta Lake 5 mi · Second Debsconeag Lake 5 mi
See how Rainbow Lake stacks up: best brook trout lakes in Maine · best arctic char lakes in Maine
More water nearby: Piscataquis County fishing maps (191 charts). Browse all Maine fishing maps or 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.