Lake Ontario

Why Ontario fishes the way it does

Ontario is the last basin in the chain and the one everything else drains through. Water arrives over Niagara Falls carrying nutrients and warmth from Erie, gets mixed hard at the bottom of the drop, and spreads into a lake deep enough to stay cold all summer. That combination — fertile inflow, cold storage — is why a comparatively small lake grows the heaviest salmon in the system.

The south shore drops off quickly. Deep water sits close to the beach, which means two things for anglers: in spring the narrow warm band along shore concentrates fish into a strip you can troll all day, and in summer the salmon are far enough out that you commit to a real run when you leave the harbor.

The east end is a different lake. Chaumont Bay, Henderson Harbor, Sackets Harbor and the water out toward the Thousand Islands is shallower, rockier, weedier and full of smallmouth, pike and walleye that the salmon fleet drives right past.

The lake also sits lowest in the chain by elevation and is governed on outflow by the Moses-Saunders dam, so water levels swing more visibly year to year than on the upper lakes. That matters mostly to marinas and shoreline property, but it shows up in launch ramp depth too.

New York’s stocking programme

Lake Ontario’s Atlantic salmon were gone by the late 1800s — dams on the tributaries, sawmill silt, and heavy netting. Lake trout were gone by the 1950s under sea lamprey. For a stretch of the twentieth century the lake had prodigious water quality problems and almost no coldwater sport fishery worth the name.

New York rebuilt it deliberately, and later than Michigan did. The state’s Department of Environmental Conservation began stocking chinook and coho into the Lake Ontario tributaries in the late 1960s, and scaled the program up sharply through the 1970s and 1980s while the DEC’s Salmon River hatchery came on line. Steelhead and brown trout stocking ran alongside, giving the lake a fishery in every month rather than a two-month king season. The Salmon River hatchery at Altmar is the anchor of the whole thing, and the fall run it produces reshaped Pulaski’s economy.

Ontario’s program has always been run with a closer eye on the forage base than some others. New York and Ontario province cut chinook stocking numbers in the 2010s when alewife assessments came in low, deliberately trading numbers of fish for size and stability. It is the same balance Lake Michigan managers ran into, handled with a smaller lake and a shorter feedback loop.

Lake trout are the other half of the story. Binational lake trout restoration on Ontario has been running for decades, paired with lamprey control in the tributaries, and natural reproduction has begun showing up in assessment surveys after a very long absence. That is a slower and quieter success than a 30-pound king, and arguably a more important one.

The ports worth launching from

Olcott and Wilson on the western end are the spring brown trout capitals, a short run to the Niagara Bar and a big charter presence for their size.

Rochester and the Genesee River mouth put you on deep water quickly with good summer king access and a real city behind you.

Oswego is the eastern hub: harbor fishing right in town, a short run to summer salmon grounds, and the closest port to the Salmon River.

Pulaski is not a port at all — it is the town on the Salmon River, and in October it is the busiest fishing address on the Great Lakes.

Henderson Harbor and Sackets Harbor open the eastern basin: protected water, excellent smallmouth, walleye, and a completely different trip from the offshore troll.

How to approach the lake as a visitor

Come in April for brown trout if you want the highest-percentage boat trip on the lake. The fish are shallow, the runs are short, and a modest boat is fine.

Come in July or August with a charter if you want a genuinely heavy chinook, and expect a long day starting in the dark.

Come in late October or November with a float rod if you want the tributaries at their best — after the crowds thin and when the steelhead have moved in behind the kings.

Watch the sky in the shoulder seasons. The east end’s lake-effect weather is not a gentle thing, and the same water that keeps the fish comfortable is what feeds the snow.

And spend a day on the east end even if you came for salmon. Chaumont Bay smallmouth on a calm September morning is one of the best-kept pieces of fishing on this entire chain.