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27,150-acre reservoir near Cascade. The lake tops out around 69 ft. The depth chart is built from real state fisheries GPS surveys, so the humps, channels and drop-offs you see are measured, not guessed. Species by species, here's what the data says the year looks like.
The drawn water covers 24,699 acres wrapped in 88.6 miles of bank, with a single island in the mix. With a shoreline index of 4, this water is all arms and coves — edge habitat well beyond its acreage. Roughly 30% of the water is 15 ft or less, the band where the food chain lives. Call it 19.3 mi long by 5.8 mi wide at the broadest reach. It sits in Valley County. Its nearest charted neighbour, Sage Hen Reservoir, is 20 mi to the south.
Start shallow in spring: yellow perch sit in 3 to 12 ft that time of year. Warm water sends them out to 10 to 30 ft; cold water stacks them in 15 to 35 ft. Top water on the chart: Shallow bay flat, a weed flat in the 2 ft range, prime in spring. Fish it in early morning and you'll meet the bite. Throw a drop-shot micro plastics or a small spoon tipped with worm until the fish tell you otherwise.
| Season | Depth | Best window | Start at | Go-to baits |
|---|---|---|---|---|
| Spring | 3 to 12 ft | midday & dawn | Shallow bay flat (2 ft) | Small jig + curly tail, Perch-pattern micro crank |
| Summer | 10 to 30 ft | dawn | Offshore hump (12 ft) | Drop-shot micro plastics, Small spoon tipped with worm |
| Fall | 12 to 35 ft | midday | Offshore hump (12 ft) | Jigging spoon (small), Perch rig / spreader |
| Winter | 15 to 35 ft | midday & dawn | Offshore hump (12 ft) | Tungsten jig + spikes, Rattle spoon (small) |
Come spring, look for smallmouth bass tight to the bank in 3 to 12 ft. They move out to 10 to 30 ft in summer and finish the year down in 20 to 45 ft. If you only fish one area, make it Rock reef: a rock pile around 6 ft that scores prime in spring. Best bite is early morning and the evening. A drop shot (goby/minnow) or a ned rig is the honest summer answer here.
| Season | Depth | Best window | Start at | Go-to baits |
|---|---|---|---|---|
| Spring | 3 to 12 ft | dawn & dusk | Rock reef (6 ft) | Ned rig, Tube jig |
| Summer | 10 to 30 ft | dawn & dusk | Offshore hump (12 ft) | Drop shot (goby/minnow), Ned rig |
| Fall | 8 to 25 ft | midday & dawn | Main-lake point (14 ft) | Jerkbait, Blade bait |
| Winter | 20 to 45 ft | midday | Break off the point (2 ft) | Blade bait, Hair jig |
When the water first warms, largemouth bass slide up into 2 to 10 ft. Summer is an 8 to 20 ft game here, winter a 15 to 35 ft one. Start at Shallow bay flat. It's a weed flat holding about 2 ft of water and rates prime come spring. The feeding windows run early morning and the evening. Keep a texas-rigged 10" worm or a deep-diving crankbait rigged through the warm months.
| Season | Depth | Best window | Start at | Go-to baits |
|---|---|---|---|---|
| Spring | 2 to 10 ft | dawn & dusk | Shallow bay flat (2 ft) | Spinnerbait, Chatterbait |
| Summer | 8 to 20 ft | dawn & dusk | Main-lake point (14 ft) | Texas-rigged 10" worm, Deep-diving crankbait |
| Fall | 4 to 15 ft | midday & dawn | Main-lake point (14 ft) | Squarebill crankbait (shad), Spinnerbait |
| Winter | 15 to 35 ft | midday | Offshore hump (12 ft) | Blade bait, Jigging spoon |
Early season rainbow trout use the shallows, holding in 5 to 20 ft. Expect a summer slide to 8 to 30 ft, then a winter hold in 8 to 40 ft. Put Main-lake point first on the milk run — a point near 14 ft that grades prime for spring. In summer the feeding windows fall in early morning and the evening. Tie on a dodger + spoon (deep troll) or a flutter spoon and you're in the game.
| Season | Depth | Best window | Start at | Go-to baits |
|---|---|---|---|---|
| Spring | 5 to 20 ft | dawn & dusk | Main-lake point (14 ft) | Inline spinner (silver), Small spoon |
| Summer | 8 to 30 ft | dawn & dusk | Rock reef (6 ft) | Dodger + spoon (deep troll), Flutter spoon |
| Fall | 10 to 35 ft | dawn & dusk | Main-lake point (14 ft) | Casting spoon, Jerkbait over shoals |
| Winter | 8 to 40 ft | dawn | Break off the point (2 ft) | Jigging spoon, Tube jig (white) |
Spring kokanee on Cascade Reservoir hold shallow, usually 10 to 30 ft. By summer they slide out to 21 to 69 ft, and by winter most fish are in 17 to 69 ft. The chart's best answer is Deep basin — deep basin, 62 ft, prime for summer. Prime time lands in early morning. The summer box starts with a dodger + pink/orange squid on downrigger or a kokanee bug + corn.
| Season | Depth | Best window | Start at | Go-to baits |
|---|---|---|---|---|
| Spring | 10 to 30 ft | dawn | Offshore hump (12 ft) | Small dodger + squid (pink), Wedding-ring spinner + corn |
| Summer | 21 to 69 ft | dawn | Deep basin (62 ft) | Dodger + pink/orange squid on downrigger, Kokanee bug + corn |
| Fall | 5 to 40 ft | dawn | Break off the point (2 ft) | Dodger + squid (deeper red/purple), Small spoon |
| Winter | 17 to 69 ft | dawn | Deep basin (62 ft) | Small glow jig + corn or maggot, Tiny spoon |
Spring puts cutthroat trout in skinny water — 3 to 15 ft is the zone. Warm water sends them out to 10 to 35 ft; cold water stacks them in 10 to 40 ft. Main-lake point is the standout, a point at roughly 14 ft, rated prime for fall cutthroat trout. Plan around early morning and the evening in the warm months. A trolled spoon (small) or an inline spinner covers the summer program.
| Season | Depth | Best window | Start at | Go-to baits |
|---|---|---|---|---|
| Spring | 3 to 15 ft | dawn & dusk | Main-lake point (14 ft) | Inline spinner (silver/gold), Small spoon |
| Summer | 10 to 35 ft | dawn & dusk | Main-lake point (14 ft) | Trolled spoon (small), Inline spinner |
| Fall | 5 to 25 ft | dawn & dusk | Main-lake point (14 ft) | Casting spoon, Inline spinner |
| Winter | 10 to 40 ft | dawn | Main-lake point (14 ft) | Small jigging spoon, Marabou jig |
Cascade Reservoir also holds walleye (15 to 35 ft in summer), brown trout (25 to 60 ft in summer), lake whitefish (21 to 69 ft in summer). Pick any of them on the map above for rated spots and bait picks.
14 pieces of structure are mapped here — Deep basin, around 62 ft, is the deepest of them.
Access data: OpenStreetMap contributors (ODbL) — community-mapped launches. Confirm conditions and fees locally before you launch.
| Date | Species | Count | Size |
|---|---|---|---|
| Jun 17 | Coho Salmon | — | ~4.5" |
| May 7 | Rainbow Trout | — | ~13" |
Source: Idaho Fish & Game stocking records, retrieved 2026-08-18.
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 Cascade Reservoir specifically, so confirm the current rules before you fish.
Check the official Idaho fishing regulations →
Cascade Reservoir is about 69 ft (21 m) deep at its deepest point. The depth chart here comes from real state fisheries GPS surveys, so the contours reflect measured depths.
Anglers target yellow perch, smallmouth bass, largemouth bass, rainbow trout, kokanee, cutthroat trout, walleye, brown trout, lake whitefish on Cascade Reservoir.
Rock reef is the top-rated area: a rock pile in about 6 ft of water that rates prime for smallmouth bass in spring. Every other rated spot, per species and season, is on the map above.
For yellow perch, 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.
Yes — per Idaho Fish & Game stocking records records, Cascade Reservoir was most recently stocked Jun 17 with coho salmon. The full stocking history is listed above.
Fishing on Cascade Reservoir 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.
Sage Hen Reservoir 20 mi · Payette Lake 21 mi · Blackwell Lake 25 mi · Deadwood Reservoir 30 mi · Lost Valley Reservoir 30 mi · Goose Lake 32 mi · Hornet Reservoir 34 mi · Upper Payette Lake 35 mi · Mann Creek Reservoir 42 mi · Bull Trout Lake 47 mi · Brownlee Reservoir 48 mi, ID/OR · Cape Horn Lake #1 50 mi
See how Cascade Reservoir stacks up: best largemouth bass lakes in Idaho · best smallmouth bass lakes in Idaho · best rainbow trout lakes in Idaho · best yellow perch lakes in Idaho
More water nearby: Valley County fishing maps (5 charts). Browse all Idaho fishing maps or see every water on DepthScout. Bathymetry credit: state fisheries survey programs. 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.