Salmon vs. Steelhead: How To Tell the Difference

When fishing along the rivers in Idaho, you will likely see two amazing fish: salmon and steelhead. But how to tell them apart is a common question for anglers, one that’s important to know how to answer in order to stay within catch-and-release guidelines. Get ready to swim through the differences that make each of the powerful salmon and steelhead fish unique.

How To Tell Them Apart on the River

While salmon and steelhead can look similar at first glance, a closer look reveals some differences that anglers can spot. Salmon tend to have a larger, deeper body with a pronounced hooked jaw (kype) and teeth during spawning season. Their coloration is also unique. For example, Chinook salmon may show deep maroon or olive hues, while Sockeye develop vivid red bodies.

Steelhead are more streamlined and silvery, often displaying a subtle pink lateral stripe and small black spots clustered along the back and tail. During spawning, steelhead slightly darken but maintain their silver sheen. Take note of body shape, color changes, and jaw structure as clues to help you confidently tell the difference between salmon and steelhead.

Migration Patterns and Spawning Runs: How To Spot Them

Salmon and steelhead both take on incredible migrations through Idaho’s rivers, but their timing and behaviors are different. Salmon usually journey upriver in massive groups during late spring through fall, with their bodies darkening and changing color as they near their spawning grounds.

Steelhead fish make their runs during winter and early spring, arriving in smaller, more scattered numbers. They stay silvery with a faint pink stripe and tend to rest in deeper runs and pools, not gathering in the crowded groups that salmon do. Observe when and where the fish travel, noting their color and group behavior, and you can tell whether you’re seeing salmon or steelhead on their epic upstream quests.

The Ultimate River Experience

Telling these fish apart is one thing, but experiencing them in their natural habitat is another. The thrill of steelhead fishing in Idaho is an unmatched adventure that connects you to the wild heart of our state’s beautiful rivers. From their powerful runs to their acrobatic leaps, these fish put on a show you won’t forget.

See these magnificent fish for yourself and make some incredible memories on the water. Book a jet boat tour with River Adventures Inc. today and let us guide you on an unforgettable Idaho river adventure into the world of salmon and steelhead.