Idaho spring chinook

Name: Spring Chinook passage at Lower Granite Dam
Creator: U.S. Army Corps of Engineers

The first chinook of the year over the dam, bound for the Clearwater, the Salmon and the Snake, and the run every Idaho corridor water sees some of.

Crosses the dam through May and is mostly past by the end of June. More about the species.

Counts through Thu, Oct 22 · yesterdayCurrent

The Corps posts each day's count a day late. Next update tomorrow around noon Mountain.

Right now

Lower Granite is the last dam below Idaho. Fish counted there are headed for the Snake, Clearwater and Salmon systems.

No salmon or steelhead are moving past Lower Granite right now.

Spring chinook: over for the year, 28,119 passed Lower Granite against a typical 37,000.Season over

When they reach this water

Antennas in the water read tagged fish as they swim past. A best guess is our estimate of the peak; fish seen are dates real fish were actually recorded. Each spot below says whether it sits on this river or on a tributary.

No arrival timing for the Spring Chinook yet: no PIT-tag array reads this stretch, so the run status above is Lower Granite Dam's.

Arrival timing from PIT-tag detections via PTAGIS and Columbia River DART; tagged fish are a sample of the run, never a count.

Counts by the U.S. Army Corps of Engineers via Columbia River DART.

The season

When spring chinook usually cross Lower Granite, across the whole run-year, and where this year sits against it.

The dashed line is what the date usually brings at Lower Granite, the ten-year median. The solid line is this run-year so far. Passage usually peaks around May 21.

Past seasons

Complete run-years at Lower Granite, newest first. The run-year in progress is left out: a season still being counted is not a season total.

Spring chinook totals by run-year at Lower Granite Dam
Run-year	Counted at Lower Granite
2025	45,179
2024	45,222
2023	43,254
2022	57,912
2021	29,634
2020	23,379
2019	19,155
2018	31,161
2017	27,357
2016	62,051

Where they go in Idaho

The corridor waters whose pages read a spring chinook run.