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Rating depth structure for largemouth bass.
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845-acre reservoir near Quebradillas. A scenic karst-country reservoir in northwest Puerto Rico known for largemouth and peacock bass over tilapia, catfish and sunfish. The lake tops out around 89 ft. The depth chart comes from U.S. Geological Survey 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.
The drawn water covers 825 acres wrapped in 18.6 miles of bank. That shoreline is heavily fingered (development index 4.6) — bays, points and pockets everywhere, which multiplies the fishable edge. 52% of the surface is littoral (under ~15 ft) — cover, weeds and forage water. The basin spans about 2.9 mi end to end and 1.8 mi across at its widest. It sits in Quebradillas County. Lago Dos Bocas sits 17 mi east — the closest neighbouring chart.
Spring largemouth bass on Lago Guajataca hold shallow, usually 2 to 10 ft. They move out to 8 to 20 ft in summer and finish the year down in 15 to 35 ft. Put Back-bay flat first on the milk run — a weed flat near 2 ft that grades prime for spring. The feeding windows run early morning and the evening. The summer box starts with a texas-rigged 10" worm or a deep-diving crankbait.
| Season | Depth | Best window | Start at | Go-to baits |
|---|---|---|---|---|
| Spring | 2 to 10 ft | dawn & dusk | Back-bay flat (2 ft) | Spinnerbait, Chatterbait |
| Summer | 8 to 20 ft | dawn & dusk | Shallow bay flat (12 ft) | Texas-rigged 10" worm, Deep-diving crankbait |
| Fall | 4 to 15 ft | midday & dawn | Secondary point (4 ft) | Squarebill crankbait (shad), Spinnerbait |
| Winter | 15 to 35 ft | midday | Break off the point (56 ft) | Blade bait, Jigging spoon |
When the water first warms, peacock bass (tucunaré) slide up into 2 to 12 ft. Summer is a 3 to 15 ft game here, winter a 6 to 22 ft one. Start at Main-lake point. It's a point holding about 3 ft of water and rates prime come spring. The feeding windows run midday and early morning. Keep a topwater (walking bait) or a jerkbait rigged through the warm months.
| Season | Depth | Best window | Start at | Go-to baits |
|---|---|---|---|---|
| Spring | 2 to 12 ft | midday & dawn | Main-lake point (3 ft) | Topwater prop bait, Jerkbait (fire tiger) |
| Summer | 3 to 15 ft | midday & dawn | Main-lake point (3 ft) | Topwater (walking bait), Jerkbait |
| Fall | 3 to 15 ft | midday & dawn | Main-lake point (3 ft) | Jerkbait, Swimbait |
| Winter | 6 to 22 ft | midday | Secondary point (4 ft) | Slow jerkbait, Jig |
Early season tilapia use the shallows, holding in 1 to 6 ft. Summer is a 2 to 10 ft game here, winter a 5 to 18 ft one. The chart's best answer is Back-bay flat — weed flat, 2 ft, prime for spring. Best bite is midday and early morning. Tie on a micro-jig near weed edges and you're in the game.
| Season | Depth | Best window | Start at | Go-to baits |
|---|---|---|---|---|
| Spring | 1 to 6 ft | midday & dusk | Back-bay flat (2 ft) | Tiny jig + bread-ball tip, Small worm under float |
| Summer | 2 to 10 ft | midday & dawn | Back-bay flat (2 ft) | Micro-jig near weed edges |
| Fall | 3 to 12 ft | midday | Shallow bay flat (12 ft) | Small jig tipped with worm |
| Winter | 5 to 18 ft | midday | Shallow bay flat (12 ft) | Slow micro-jig, warm outflows |
Spring channel catfish on Lago Guajataca hold shallow, usually 3 to 12 ft. They move out to 8 to 25 ft in summer and finish the year down in 20 to 40 ft. Put Shallow bay flat first on the milk run — a weed flat near 12 ft that grades good for spring. The feeding windows run after dark and the evening.
| Season | Depth | Best window | Start at | Go-to baits |
|---|---|---|---|---|
| Spring | 3 to 12 ft | dusk | Shallow bay flat (12 ft) | |
| Summer | 8 to 25 ft | night & dusk | open water | |
| Fall | 10 to 30 ft | dusk | Deep basin (89 ft) | |
| Winter | 20 to 40 ft | midday | Deep basin (89 ft) |
Early season bluegill use the shallows, holding in 1 to 6 ft. Expect a summer slide to 4 to 15 ft, then a winter hold in 10 to 25 ft. Put Back-bay flat first on the milk run — a weed flat near 2 ft that grades prime for spring. In summer the feeding windows fall in early morning and the evening. Tie on a small sponge spider (fly) or a micro tube jig and you're in the game.
| Season | Depth | Best window | Start at | Go-to baits |
|---|---|---|---|---|
| Spring | 1 to 6 ft | midday & dusk | Back-bay flat (2 ft) | 1/32 oz jig + micro plastic, Tiny popper (evenings) |
| Summer | 4 to 15 ft | dawn & dusk | Shallow bay flat (12 ft) | Small sponge spider (fly), Micro tube jig |
| Fall | 6 to 18 ft | midday | Shallow bay flat (12 ft) | Micro jig + waxworm, Small spoon tipped |
| Winter | 10 to 25 ft | midday | Shallow bay flat (12 ft) | Tiny spoon |
Lago Guajataca carries 6 mapped structure features, topping out (or rather bottoming out) at Deep basin, about 89 ft down.
Access data: OpenStreetMap contributors (ODbL) — community-mapped launches. Confirm conditions and fees locally before you launch.
Season dates, license requirements, and size and bag limits for Puerto Rico waters are set by the Puerto Rico DRNA — and special regulations can apply to Lago Guajataca specifically, so confirm the current rules before you fish.
Check the official Puerto Rico fishing regulations →
Lago Guajataca is about 89 ft (27 m) deep at its deepest point. The depth chart comes from U.S. Geological Survey bathymetric survey data, so the contours are survey-derived rather than computer-modeled.
Anglers target largemouth bass, peacock bass (tucunaré), tilapia, channel catfish, bluegill on Lago Guajataca.
Back-bay flat is the top-rated area: a weed flat in about 2 ft of water that rates prime for largemouth bass in spring. 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 Lago Guajataca is regulated by the Puerto Rico DRNA. Check the official Puerto Rico regulations for current license requirements, season dates, and size and bag limits — special regulations can apply to this specific water.
Lago Dos Bocas 17 mi · Lago Caonillas 19 mi · Lago Lucchetti 20 mi · Bahía de Guayanilla 28 mi · Bahía de Guánica 29 mi · Lago Cerrillos 29 mi · Bahía de Ballena 30 mi · Bahía Tallaboa 30 mi · Ensenada las Pardas 30 mi · Caleta Salinas 31 mi · Lago de Matrullas 31 mi · Bahía de Boquerón 31 mi
See how Lago Guajataca stacks up: best largemouth bass lakes in Puerto Rico · best peacock bass (tucunaré) lakes in Puerto Rico · best tilapia lakes in Puerto Rico · best bluegill lakes in Puerto Rico
Browse all Puerto Rico fishing maps or see every water on DepthScout. Bathymetry credit: U.S. Geological Survey. 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.