The Spokane River’s Redband Trout: A Hidden Battle

Redband trout are the pride of Spokane, but their survival is in danger.

These fish thrive only when water stays cool and clear.
When the river warms, other species like smallmouth bass move in and eat them.

The trout’s home is a high‑desert stream.
Water from the Spokane Valley‑Rathdrum Prairie Aquifer keeps parts of the river cold even in summer.
If the aquifer drops, the river slows and heats up.

Dams also slow water flow.
Water backed up by dams stays warm, especially near the Idaho border.

Less snow in winter means less cool meltwater enters the river later, making it hotter.

Clear water is vital.
Sediment from nearby Hangman Creek clogs trout eggs and covers their nests.
It also blocks oxygen and kills the insects trout eat.

The trout can’t simply move upstream when its spawning spot is damaged.
Their eggs need gravel beds with good flow and low silt.
Heavy sediment fills the gaps, smothering eggs and trapping young trout.

People can help by using less water.
Lower aquifer levels mean lower river levels, so conserving water keeps the river healthier.

Anglers should practice catch‑and‑release and use barbless hooks.
Volunteers can clean the river and track temperature changes.

Stormwater from streets carries oil, fertilizer, pet waste, and sediment straight into the river.
Every resident can watch for problems and report them to local authorities.

By learning about the river, staying aware of its changes, and acting quickly, Spokane can protect its beloved trout.