California Delta

Sacramento–San Joaquin Delta — Tidal Largemouth & Striper Maze
CaliforniaTidal delta · ~100 sq mi core bass regionMAX DEPTH 40 FTCLARITY TIDAL — TURBID TO CLEARING, WIND & TIDE DRIVEN
WATER TEMP68°F+1.1°F in 13 daysSACRAMENTO R A FREEPORT CA · 31 mi
Measured Monday, September 14, 2026 · refreshed daily · the guide report reads these for you
California Delta depth contours — shallow flats bright, the creek channel and deep basin dark
California Delta surveyed depth — open the app for the live, zoomable map

The fishery

California Delta — Contra Costa & San Joaquin Counties, CA · tidal (no fixed pool). 40 ft at its deepest. Known for Sacramento–San Joaquin Delta — Tidal Largemouth & Striper Maze. Alongside largemouth it carries striped bass, smallmouth bass, black crappie and bluegill. Forage runs to threadfin shad, crayfish and bluegill.

Species

Largemouth bass · Striped bass · Smallmouth bass · Black crappie · Bluegill · Channel catfish · White catfish

On BassHawk

Everything below points at one goal — finding the most, and the biggest, largemouth bass on California Delta.

Mapped on BassHawk

Traced from pre-dam survey sheets — the roads, foundations and creek beds that were there before the water.

Getting on the water

Boat Ramp
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Antioch Marina (marina)
Big Break Marina (marina)
Driftwood Marina (marina)
Kokopelli Kayak Rentals (marina)
Korths Pirates Lair (marina)
Owl Harbor Marina (marina)
Russo's Marina (marina)
Sugar Barge Resort (marina)
Tower Park Marina (marina)

What a guide report looks like

A complete, real report for California Delta — nothing held back. It ran on that day's conditions; open the app for today's.

SAMPLE GUIDE REPORT · TUESDAY, SEPTEMBER 15, 2026

Fall transition fires the shallow bite on grass and riprap before the deep pull starts.

WATER 68°FAIR 55°FWIND 5 MPH SECLARITY TIDAL — TURBID TO CLEARING, WIND & TIDE DRIVENSEASON FALL

Water's sitting at 68 degrees, right in the sweet spot where bass feed hard and chase baits. Fall's arrived, which means fish are grouping tighter and starting to think about moving from summer hangouts. Clarity's tidal and turbid so far, which actually helps you cover water fast and get reaction strikes. Pressure's steady, no fronts rolling in, and with clear skies the shallow stuff will hold fish through early morning before they slide a bit deeper as the sun climbs. This is one of the better windows in fall before water cools and everything tightens up on deep structure. You're fishing an active bite in the transition zone where grass clumps, riprap, and shallow channel edges hold a mix of feeders and stage fish. Work those areas hard early, then adjust deeper or to shade if the sun gets too bright.

The day's game plan

EARLY MORNING · 6:48 AM to 8:30 AM
Grass clumps and riprap banks in 3 to 6 feet, tule edges along Old River and Victoria Canal, shallow hard-bottom pockets.
White or chartreuse chatterbait, 3/8 oz, snap it hard and keep it moving with short erratic pauses. Pair it with a 4-inch shad-profile swimbait trailer. Work the edge where grass meets open water and bounce it off riprap.
Water's cool and clear at dawn, bass are looking up for bait moving through the shallows before the sun comes up. Chatterbaits trigger reaction strikes in turbid water, and the trailer gives them a profile to track. This is when the most aggressive fish bite before they settle.
MORNING · 8:30 AM to 11:00 AM
Riprap banks, grass line transitions, shallow flats in 4 to 8 feet near Frank's Tract and Big Break.
5-inch green-pumpkin swimbaits on a 3/16 oz jighead, slow roll them along the grass edge and let them sink on any pause. Cast parallel to the bank and work it steady with occasional twitches.
Sun's climbing but still angled low enough that fish stay shallow. Swimbaits match the small shad that are hanging in the fall, and green pumpkin works in turbid water. This window still has plenty of active fish before midday pushes them tighter to cover.
MIDDAY · 11:00 AM to 2:30 PM
Deeper grass pockets and channel edges in 8 to 12 feet, submerged clumps near current breaks, shadow side of riprap banks.
3/8 oz vibrating jig in junebug or black, work it vertical on any isolated cover or drag it along channel ledges. Keep the pace moderate and let the vibration do the work.
Sun's high and bright, so fish back off the shallowest stuff. They're still in the area but tighter to structure and moving less. Vibrating jigs hunt them down on the edges and in holes without wasting time. Turbid water helps since the blade creates vibration they feel more than see.
LATE AFTERNOON · 2:30 PM to 5:00 PM
Tule edges and shallow mats in 2 to 5 feet, isolated grass clumps, pockets between matted cover near Little Mandeville and Big Break.
Bladed vibrating jig, 1/4 oz, over scattered grass clumps. Pair it with a small craw or creature trailer and keep it moving steadily with quick hops. Drop it in any pocket you see.
Water's been warmed a bit by midday sun but still cool enough that bass creep back shallow as the sun angle drops. Afternoon tide might be starting a push or pull depending on the tide calendar, which concentrates bait around structure. The vibrating jig covers water fast and triggers the stragglers still feeding.
EVENING · 5:00 PM to 6:45 PM
Riprap banks, tule lines, shallow flats in 3 to 6 feet, current breaks where water moves through channels.
Chartreuse Jackhammer chatterbait, 3/8 oz, worked fast with hard snaps and pauses. Lean on a white or silver swimbait trailer for contrast in the fading light.
Sun's sinking so water cools and light gets diffuse. Bass move back to the shallows for one more active window. Chatterbaits in bright colors create contrast and vibration when visibility drops. This is prime feeding time before sunset.
DUSK · 6:45 PM to 7:30 PM
Grass lines, tule edges, shallow banks in 2 to 5 feet, any pocket or shadow near cover.
Walking topwater like a Whopper Plopper in natural shad or white, or a small popper, worked slow and deliberate over grass edges and mat pockets.
Light's nearly gone, bass hunt by silhouette and lateral line. Topwater creates a disturbance they sense and hear. Slow walking keeps them interested without spooking them. This is often the most explosive window of the day in clear water.
NIGHT · 7:30 PM to dawn
Shallow grass mats in 1 to 4 feet, matted tule, isolated cover pockets, riprap banks.
Black or junebug frog, 1/2 to 3/4 oz, walked slowly over thick mats or cast into pockets and left to sit for 3 to 5 seconds before twitching. Keep everything dark and deliberate.
Complete darkness favors dark silhouettes, and frogs walk over mats without snagging. Bass hunt the shallows all night in fall, especially when water's in the comfortable 60s and 70s. Few anglers fish this window, so fish are less pressured.

Where to fish

What to throw

How to work it

Pro tips

If conditions change

If a front blows through and pressure starts rising with clearing skies, fish will pull tighter to cover and lose the aggressive bite. Switch to finesse: downsize to a 4-inch green-pumpkin worm on a drop-shot or a shaky head, fish right on the thickest grass or deepest mat pocket, and slow everything down. Move to shade and deeper edges. If the wind cranks up and water gets stained from chop, your chatterbaits and vibrating jigs actually get better because vibration matters more. Stick with them but work slightly deeper to find stable water. If clarity improves and the water clears, go with natural shad colors, downsize to 4-inch swimbaits, add fluorocarbon leader, and fish the edges of cover rather than tight against it. The fish will be less concentrated and more scattered when water clears.

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