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21-acre reservoir near Kalāheo. The lake tops out around 25 ft. The chart is a model: real shoreline, published maximum depth, interpolated in between. A planning tool, never a navigation product. The season-by-season read for each species follows, from the map's own numbers.
Drawn out, this is 21 acres of water rimmed by 1 miles of bank. Index 1.5 on the shoreline: a few honest points and pockets, nothing labyrinthine. Roughly 52% of the water is 15 ft or less as modeled, the band where the food chain lives. End to end it runs roughly 0.3 mi, about 0.2 mi across. You'll find it in Kauai County. For a second option, Waita Reservoir lies 2 mi southeast.
Spring puts largemouth bass in skinny water — 2 to 10 ft is the zone. Warm water sends them out to 8 to 20 ft; cold water stacks them in 8 to 25 ft. Main-lake point is the standout, a point at roughly 8 ft, rated prime for fall largemouth bass. Plan around early morning and the evening in the warm months. A texas-rigged 10" worm or a deep-diving crankbait covers the summer program.
| Season | Depth | Best window | Start at | Go-to baits |
|---|---|---|---|---|
| Spring | 2 to 10 ft | dawn & dusk | Main-lake point (8 ft) | Spinnerbait, Chatterbait |
| Summer | 8 to 20 ft | dawn & dusk | Break off the point (11 ft) | Texas-rigged 10" worm, Deep-diving crankbait |
| Fall | 4 to 15 ft | midday & dawn | Main-lake point (8 ft) | Squarebill crankbait (shad), Spinnerbait |
| Winter | 8 to 25 ft | midday | Break off the point (11 ft) | Blade bait, Jigging spoon |
Spring puts peacock bass (tucunaré) in skinny water — 2 to 12 ft is the zone. As the season builds they drop to 3 to 15 ft, wintering in 6 to 22 ft. Spring peacock bass (tucunaré) concentrate at Main-lake point, a prime-rated point around 8 ft. Warm-month bites cluster around midday and early morning. A topwater (walking bait) or a jerkbait covers the summer program.
| Season | Depth | Best window | Start at | Go-to baits |
|---|---|---|---|---|
| Spring | 2 to 12 ft | midday & dawn | Main-lake point (8 ft) | Topwater prop bait, Jerkbait (fire tiger) |
| Summer | 3 to 15 ft | midday & dawn | Main-lake point (8 ft) | Topwater (walking bait), Jerkbait |
| Fall | 3 to 15 ft | midday & dawn | Main-lake point (8 ft) | Jerkbait, Swimbait |
| Winter | 6 to 22 ft | midday | Break off the point (11 ft) | Slow jerkbait, Jig |
Start shallow in spring: bluegill sit in 1 to 6 ft that time of year. Warm water sends them out to 4 to 15 ft; cold water stacks them in 10 to 25 ft. Top water on the chart: Deep basin, a deep basin in the 21 ft range, prime in winter. Fish it in early morning and the evening and you'll meet the bite. Throw a small sponge spider (fly) or a micro tube jig until the fish tell you otherwise.
| Season | Depth | Best window | Start at | Go-to baits |
|---|---|---|---|---|
| Spring | 1 to 6 ft | midday & dusk | open water | 1/32 oz jig + micro plastic, Tiny popper (evenings) |
| Summer | 4 to 15 ft | dawn & dusk | open water | Small sponge spider (fly), Micro tube jig |
| Fall | 6 to 18 ft | midday | Break off the point (11 ft) | Micro jig + waxworm, Small spoon tipped |
| Winter | 10 to 25 ft | midday | Deep basin (21 ft) | Tiny spoon |
In spring, tilapia run shallow here, mostly 1 to 6 ft. Midsummer fish sit out in 2 to 10 ft before dropping to 5 to 18 ft for winter. Winter tilapia concentrate at Break off the point, a prime-rated drop-off around 11 ft. Fish it in midday and early morning and you'll meet the bite. You won't need more than a micro-jig near weed edges most summer days.
| Season | Depth | Best window | Start at | Go-to baits |
|---|---|---|---|---|
| Spring | 1 to 6 ft | midday & dusk | Main-lake point (8 ft) | Tiny jig + bread-ball tip, Small worm under float |
| Summer | 2 to 10 ft | midday & dawn | open water | Micro-jig near weed edges |
| Fall | 3 to 12 ft | midday | Break off the point (11 ft) | Small jig tipped with worm |
| Winter | 5 to 18 ft | midday | Break off the point (11 ft) | Slow micro-jig, warm outflows |
3 pieces of structure are mapped here — Deep basin, around 21 ft, is the deepest of them.
Season dates, license requirements, and size and bag limits for Hawaii waters are set by the Hawaii DLNR — and special regulations can apply to Mauka Reservoir specifically, so confirm the current rules before you fish.
Check the official Hawaii fishing regulations →
Mauka Reservoir is about 25 ft (8 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 largemouth bass, peacock bass (tucunaré), bluegill, tilapia on Mauka Reservoir.
Main-lake point is the top-rated area: a point in about 8 ft of water that rates prime for largemouth bass in fall. Scroll up to the map for the complete spot list by species and season.
For largemouth bass, 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 Mauka Reservoir is regulated by the Hawaii DLNR. Check the official Hawaii regulations for current license requirements, season dates, and size and bag limits — special regulations can apply to this specific water.
Waita Reservoir 2 mi · Aepo Reservoir 3 mi · Halenanahu Reservoir 3 mi · Aepoeha Reservoir 3 mi · Alexander Reservoir 4 mi · Ipuolono Reservoir 4 mi · Kapaia Reservoir 7 mi · Wailua Reservoir 9 mi · Puʻu Lua Reservoir (Kōkeʻe) 17 mi · Kalihiwai Reservoir 17 mi · Puu Ka Ele Reservoir 17 mi · Waiakalua Reservoir 19 mi
See how Mauka Reservoir stacks up: best largemouth bass lakes in Hawaii · best peacock bass (tucunaré) lakes in Hawaii · best tilapia lakes in Hawaii · best bluegill lakes in Hawaii
More water nearby: Kauai County fishing maps (13 charts). Browse all Hawaii 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.