Central Valley / Sacramento–San Joaquin Delta · California · Multiple (Sacramento / Contra Costa / Solano / San Joaquin) County
Field readiness
57/100
Catalog tags
Season windows
Standing MM-DD windows from the official agency page used for this record. Emergency orders can supersede them the same day. Bag, size and gear still apply outside these closures.
11-16 → 04-24
Zero-trout bag on inland streams (CDFW — Nov 16 through the Friday before the last Saturday in April)
T14 CCR 5.85(a)(2): inland streams, rivers and canals are open "from the last Saturday in April through November 15" with a five-trout bag; "From November 16 through the Friday preceding the last Saturday in April, a zero-trout bag limit applies, and only artificial lures with barbless hooks may be used for all species of fish." Not a full closure — fishing continues, harvest of trout does not. Sections 7.40(b) and 7.50(b) list the exceptions. https://wildlife.ca.gov/Regulations
Provenance
2026-09-08 review: California Freshwater Sport Fishing Regulations (updated July 10 2026), T14 CCR 5.85. The statewide inland stream rule was previously not recorded on the ground that no single dated window applied statewide. It does: the zero-trout, artificial-barbless-only period is a published statewide rule for streams, rivers and canals, and it is a harvest restriction a reader needs before travelling.
Same-day unresolved
What's in this reading
Open a layer to see the documented signals behind it and the unknowns it cannot close. Every layer reports what an agency published — none of it is an observation of the water today.
What the record says
multiple official access sites
Miller Park and Garcia Bend public boat ramps (Sacramento — launch at own risk as published) — City of Sacramento public ramps. Annual launch passes available. Confirm open status before trailering. Access to Sacramento River and Delta system.
multiple official access sites
Brannan Island State Recreation Area, Antioch public launch, Big Break Regional Shoreline, and other named public Delta access (select named site) — Named public parks, state recreation areas, and regional shoreline access throughout the Delta. Fees and amenities vary. Confirm open status and any seasonal closures.
What this read cannot tell you
Support is a hand-set weighting of how much documented material this layer rests on. It is not a probability and nothing here was measured.
Support is a hand-set weighting of how much documented material this layer rests on. It is not a probability and nothing here was measured.
Species context
Presence context only. This is never an expectation of catch, and carries no statement about timing, forage or activity. A note in brackets is the agency’s own condition on that fish and it outranks everything else on this page. Behaviour and presentation are the next instrument’s question — carry a species forward from the section below.
Temperature
These are reviewed temperature bands for the species the agency documents here, each one carrying the source it came from. They describe the fish, not this water. Nothing on this page knows what Sacramento–San Joaquin River Delta public corridor is doing today — put a thermometer in it and the drawing will show you where that number lands.
Stays on this device. It is not saved, not synced and not sent anywhere — this instrument has no account to attach it to.
Temperature
Preference and distribution mixed. A band for the species, not a forecast for Sacramento–San Joaquin River Delta public corridor.
What the edges are. Cold edge: juvenile tolerance limit. Warm edge: measured upper avoidance. These are not one consistent quantity across species. A measured avoidance temperature is where fish were seen leaving; a water-quality maximum is a regulatory ceiling written to prevent a kill, and it sits well above the point a day gets difficult.
Source. Bain, M.B. & J.L. Bain 1982, Habitat Suitability Index Models: Coastal Stocks of Striped Bass, U.S. Fish and Wildlife Service FWS/OBS-82/10.1. Read it.
Warmwater species swing their preference ten degrees or more between winter and summer in the same laboratory. One band per species is a summer simplification, and it is why the drawing shows a band rather than a line.
Altitude matters more here than people expect. The same water at 9,000 feet holds about a quarter less oxygen at saturation than it would at sea level. Leave it blank for sea level.
Oxygen
Enter a water temperature above and the ceiling for this water appears on the curve.
Saturation is the most this water could hold if it were in equilibrium with the air. Real water sits below it — respiration, decomposition and a weed bed at four in the morning all take oxygen out — so the curve is an upper bound on a good day, never a measurement. Only a meter in the water tells you what is actually there.
Why the curve falls. Gas solubility drops as temperature rises. Water at 80°F cannot hold what the same water held at 50°F, whatever lives in it. That is why a summer warm spell and a fish kill turn up in the same week, and why the cold layer at the bottom of a stratified lake — perfect temperature, no resupply from the surface since spring — can be the emptiest water in it.
Sources. Benson & Krause 1984, Limnology and Oceanography 29(3):620–632, in the form USGS publishes for DOTABLES for the curve; U.S. EPA 1986, Ambient Water Quality Criteria for Dissolved Oxygen, EPA 440/5-86-003, Table 8 for the lines.
What this is not. Not a reading, not a forecast, and not a statement about Sacramento–San Joaquin River Delta public corridor on any particular day. Agencies publish measured dissolved oxygen at many gauges — that number outranks everything on this drawing.
No band drawn for
The fish, not the water
Movement, habitat and spawning timing for the species this record names, from the agencies that survey them. Read alongside the temperature band above: the band gives the number, and these give the behaviour that makes the number worth knowing.
4 reviewed for Largemouth bass, Striped bass. Nothing here is a rule or a season — the regulation still comes from the managing agency, on the day.
Official guide
Wisconsin Department of Natural Resources
Puts numbers on the spawn: late April to early July, eggs laid at 62–65°F, nests on sand or gravel. Knowing the temperature rather than the date is what tells you whether the shallow pattern is on this week.
Why it made the list: Fetched 2026-09-08: page loads with Distribution, Spawning and Angling sections and states the 62–65°F egg-laying range verbatim.
Open resourceOfficial guide
U.S. Fish and Wildlife Service
A two-page federal profile giving the habitat types largemouth actually occupy and the thermal envelope in which they feed, with feeding cut-offs at 41°F and 98.6°F. Useful for ruling a water out rather than in.
Why it made the list: Fetched 2026-09-08: PDF renders, dated September 2023, USFWS branding, contains the 59–75°F spawning range and both feeding cut-offs.
Open resourceOfficial guide
NOAA Fisheries
Lays out the anadromous cycle that drives the whole fishery: a spring run into fresh or brackish water to spawn, larvae drifting to estuarine nurseries, juveniles holding two to four years, then the coastal migration. Some populations stay resident and some travel far, which is why the fish are in very different places depending on the stock.
Why it made the list: Fetched 2026-09-08: page loads in the NOAA species-profile layout with the spring spawning migration, the two-to-four-year estuary residency and the St. Lawrence-to-Florida range.
Open resourceOfficial guide
Chesapeake Bay Program
Describes the seasonal depth shift inside an estuary — deeper channels in summer and winter, shallower in between — and gives the April to early June run into tidal tributaries. Notes that 70–90% of the Atlantic population spawns in the Bay.
Why it made the list: Fetched 2026-09-08: page loads as a field-guide entry with a Reproduction and life cycle heading containing the depth shift, the spawning window and the 70–90% figure.
Open resourceWhere else to look
Related public waters
Explicit catalog links only. Records are not merged; each water keeps its own source and review date.
Other river water in California
Same water class, so the read you have just done still applies.
Reading this water
A river hands you the fish's problem for free: it has to hold somewhere it can eat without swimming hard all day. Find the places where fast water and slow water meet, and you have found where to start on most rivers, including ones you have never seen before.
Craft, not observation — this is the standing read for a river. It holds no clarity, temperature, level, flow, tide or hatch for this water today, and it does not name a spot.
Water section
A section through water of this class, near side on the left. It is craft, not a survey of Sacramento–San Joaquin River Delta public corridor — the shape of this particular bank is yours to read when you get there.
Solid zones are features this class of water nearly always has. Dashed ones are the subtler reads — present often enough to look for, not often enough to assume.
Nothing here is an observation of today. No gauge reading, no clarity, no temperature and no fish went into this drawing. It is the same standing craft an angler carries between waters, and the water in front of you outranks all of it.
Plan view · where along the water
One meander with the water moving left to right. Every river you will ever stand on is some version of this repeated — riffle, run, pool, tailout, and the bend that builds all four. It is a schematic of this class of water, not a survey of Sacramento–San Joaquin River Delta public corridor — the shape of that particular shore is yours to read when you get there.
Nothing on this reach is doing anything unusual. That is a normal day, and normal days are read by walking rather than by diagram. Set a wind, a water state or a tide and the picture will move.
Water state
Tap a marked zone on the picture, or choose one by name above, for what it is, why fish relate to it, and how to find it standing there with no map. Nothing here says a fish is present — it says the physical reason that piece of water is worth a cast, and under which conditions that reason gets stronger or stops applying.
Decision flow
The drawing names features. This is the order that keeps them from becoming a scavenger hunt. Start with the force moving the water, find the shape that interrupts it, ask what changed, then verify the part the diagram cannot know today.
When the water changes
Pick what actually happened. Nothing here reads a gauge — you supply the event, from your own eyes or the agency's page, and this says what it does to water of this class.
Still craft, not observation — this is what these changes do to a river. It does not know whether any of them happened here, and it never will. The agency's page and your own eyes are the only things that do.
What this record changes about the read
3 further cues for this water class are held at a higher detail setting.
Watch · verify · keep reading
These links teach transferable mechanics. They are not sources for today’s access, rules, weather or safety. A video can explain what a current seam is; it cannot tell you whether the ramp at a named water is open this morning.
15 reviewed for this class of water. Every link was opened on the date beside it — a dead link is a defect here, not a footnote, and a scheduled job re-checks them.
Published by the bodies that measure and manage the water. These are the stable ones, and the ones to cite.
Official guide
Ausable River Association
Defines riffle, run, pool and glide by what causes them — substrate size, gradient, position on a meander — rather than by how they look, and shows how the sequence repeats down a reach. It gives you the vocabulary before you start deciding where to fish.
Open resourceOfficial guide
U.S. Geological Survey, Water Science School
Explains stage, discharge and the stage-discharge relation. Read this before treating a gauge number as if stage and flow were interchangeable.
Open resourceOfficial guide
U.S. Geological Survey, Water Resources Mission Area
What the gauges actually record — stage every fifteen minutes, converted to discharge through a rating curve built for that one site — and why some sites will never show you a flow number at all. This is what makes a gauge page legible rather than a squiggly line.
Open resourceOfficial guide
U.S. Geological Survey, Water Data for the Nation
The short version of gage height against discharge, and of gage datum — the per-site reference point that means 4.2 feet at one gauge has no relationship to 4.2 feet at another. Read it before you compare two gauges or treat a stage number as a depth.
Open resourceOfficial guide
U.S. Geological Survey, Water Science School
Why water temperature drives dissolved oxygen, and how a lake separates into layers through the season, with temperature-depth profiles from a real lake across May to October. The general-principles piece behind every seasonal temperature question in this app.
Open resourceOfficial guide
U.S. Army Corps of Engineers, Nashville District
A working example of what a Corps district publishes: pool and tailwater elevations, storage, hourly project data and proposed generation schedules. Use it as the template for finding the equivalent page for whichever district operates your reservoir — every district runs one.
Open resourceOfficial guide
U.S. Bureau of Reclamation
Daily reservoir and river operations across the five Reclamation regions, including the hydromet systems and the RISE portal. Reclamation rather than the Corps operates most western reservoirs, so this is where those levels and releases live.
Open resourceOfficial guide
NOAA National Weather Service
The three stages of cold water immersion, and the part most anglers have wrong: cold shock can be triggered by water as warm as 77°F, so a mild air temperature tells you nothing. Read it before spring wading and before any early-season boat or shore trip.
Open resourceOfficial guide
U.S. Environmental Protection Agency
EPA's hub, including the route to current state, tribal and local advisories. Advisories are issued locally rather than federally, so this is how you find out whether one specific water is under one right now.
Open resourceOfficial guide
U.S. Centers for Disease Control and Prevention
What a bloom looks like in the water — foam, scum, a spilled-paint surface — and the exposure routes for people and for dogs. The practical rule is to stay out of discoloured or foul-smelling water and check the local advisory first.
Open resourceOfficial guide
U.S. Fish and Wildlife Service
Clean, drain, dry as an actual procedure rather than a slogan: rinse the hull and gear, flush the motor, drain bilge and livewell before you leave the access, dry five days or towel down, bin unused bait. Written to be done every water, every time.
Open resourceOfficial guide
Washington Department of Fish and Wildlife
A good model of how a state regulations system is built: an annual pamphlet of statewide rules, water-specific exceptions that override them, and an emergency rule feed that supersedes the printed pamphlet mid-season. That three-part shape is near-universal, so it teaches you what to go looking for in your own state.
Open resourceOfficial guide
Minnesota Department of Natural Resources
A state identification index covering the 162 species in Minnesota waters, with a downloadable poster and a fish-families guide. Most agencies publish an equivalent, and the agency version is the one whose names match the regulations booklet.
Open resourceCraft, taught by people who fish. Chosen for the instruction and the publisher’s track record, not because a recommendation algorithm surfaced them — the observed audience numbers are on each card so you can weigh that yourself.
Video
Orvis Learning Center
Twelve short lessons on current, cover, pool tails, big rivers, pocket water, floods and droughts. The examples are trout-heavy; the current-reading mechanics travel farther than that.
Why it made the list: Re-verified 2026-09-08: page loads, all twelve segments present. Established instructional series with the whole chapter in one place.
Open resourceVideo
The Orvis Company
A compact worked example of depth, overhead cover and food supply in an ordinary straight reach. Useful after the schematic because it shows the same questions on real water.
Why it made the list: 6,801 views and 142 likes observed 2026-09-08; The Orvis Company channel, 112K subscribers, published 2020.
Open resourceWhat this read cannot tell you
Getting on the water
Access is published as an official directory of sites rather than one named place. Choose a site from that directory before you travel.
Official directory
2
A network of official sites, not one named place.
Logistics named on the official source
Parking
Parking is named on the official source. Capacity on the day is not.
Dock or slip
A dock, slip or marina facility is named on the record.
Camping
Camping is named at or beside this access. Reservations and season are the agency's to state.
Named public sites (2)
Miller Park and Garcia Bend public boat ramps (Sacramento — launch at own risk as published)
multiple official access sites
Brannan Island State Recreation Area, Antioch public launch, Big Break Regional Shoreline, and other named public Delta access (select named site)
multiple official access sites
Facility names and amenity wording are reproduced from the official source, not restated. Where a status is not shown, the source did not publish one.
Choose a site before you travel
This record covers an official directory of access sites rather than one place. Pick a named site from the official source and write it down — a network is not a destination.
Open the official directory ↗What this section cannot tell you
Hook the Horizon · the next step
You have answered where and what kind of water. Each instrument below answers the next question in the same workflow, and each link carries this record's water class, documented species, standing read, access position and declared job with it. Nothing is posted automatically, and no coordinates or private water travel in the handoff.
Narrow the handoff to one documented species (optional)
Species context is what the agency published for this water. It is never a statement that a fish is present today, or catchable.
Field Sense Navigator — which water, what kind, what to look for and what still has to be checked today.
