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Rating depth structure for rainbow trout.
Shared by DepthScout anglers. Exact spots stay private, always.
41-acre lake near Custer. The lake tops out around 13 ft. The chart is a model: real shoreline, published maximum depth, interpolated in between. A planning tool, never a navigation product. What follows comes from the same scoring engine that paints the spots above.
Traced from the shoreline, Cape Horn Lake #1 runs 40 acres with 1.4 miles of edge. The shoreline is moderately structured (index 1.6) — enough points and pockets to pattern. The whole water is littoral — nothing here runs deeper than ~15 ft, so it's all weed-and-bait territory. The basin spans about 0.5 mi end to end and 0.3 mi across at its widest. You'll find it in Custer County. For a second option, Bull Trout Lake lies 10 mi southwest.
Spring puts rainbow trout in skinny water — 3 to 13 ft is the zone. Summer fish stay in 3 to 13 ft, and winter fish hold in 3 to 13 ft. Winter rainbow trout concentrate at Break off the point, a prime-rated drop-off around 6 ft. Warm-month bites cluster around early morning and the evening. A dodger + spoon (deep troll) or a flutter spoon covers the summer program.
| Season | Depth | Best window | Start at | Go-to baits |
|---|---|---|---|---|
| Spring | 3 to 13 ft | dawn & dusk | Main-lake point (8 ft) | Inline spinner (silver), Small spoon |
| Summer | 3 to 13 ft | dawn & dusk | Break off the point (6 ft) | Dodger + spoon (deep troll), Flutter spoon |
| Fall | 4 to 13 ft | dawn & dusk | Main-lake point (8 ft) | Casting spoon, Jerkbait over shoals |
| Winter | 3 to 13 ft | dawn | Break off the point (6 ft) | Jigging spoon, Tube jig (white) |
The chart marks 5 structure features on Cape Horn Lake #1; the deepest is Deep basin at about 11 ft.
| Date | Species | Count | Size |
|---|---|---|---|
| Aug 4 | Rainbow Trout | 254 | ~13" |
| Jul 8 | Rainbow Trout | 250 | — |
| Jun 17 | Rainbow Trout | 250 | — |
| Aug 22, 2025 | Rainbow Trout | 300 | ~13" |
| Aug 7, 2025 | Rainbow Trout | 300 | ~13" |
Source: Idaho Fish & Game stocking records, retrieved 2026-09-03.
Season dates, license requirements, and size and bag limits for Idaho waters are set by the Idaho Fish and Game — and special regulations can apply to Cape Horn Lake #1 specifically, so confirm the current rules before you fish.
Check the official Idaho fishing regulations →
Cape Horn Lake #1 is about 13 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 rainbow trout on Cape Horn Lake #1.
Break off the point is the top-rated area: a drop-off in about 6 ft of water that rates prime for rainbow trout in winter. Scroll up to the map for the complete spot list by species and season.
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.
Yes — per Idaho Fish & Game stocking records records, Cape Horn Lake #1 was most recently stocked Aug 4 with 254 rainbow trout. The full stocking history is listed above.
Fishing on Cape Horn Lake #1 is regulated by the Idaho Fish and Game. Check the official Idaho regulations for current license requirements, season dates, and size and bag limits — special regulations can apply to this specific water.
Bull Trout Lake 10 mi · Deadwood Reservoir 27 mi · Salmon River (Upper) 28 mi · Yellow Belly Lake 31 mi · Toxaway Lake 32 mi · Pettit Lake 32 mi · Perkins Lake 36 mi · Cascade Reservoir 50 mi · Sage Hen Reservoir 52 mi · Payette Lake 56 mi · Blackwell Lake 58 mi · Upper Payette Lake 66 mi
See how Cape Horn Lake #1 stacks up: best rainbow trout lakes in Idaho
Browse all Idaho fishing maps or 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.