The river takes its name from Edward Stamp, a Victorian-era sawmill pioneer who helped establish the Alberni Valley's first lumber operations in the 1860s. Stamp arrived with machinery and ambition, backed by the London shipping firm Anderson, Anderson and Company, and set about turning old-growth timber into exportable lumber. The river he lent his name to flows out of Great Central Lake and south toward Port Alberni, dropping through rapids and a waterfall before joining the Sproat River to form the Somass. The 327-hectare provincial park protects a stretch of this river 14 kilometers north of Port Alberni, preserving both the rapids and the fish ladder that makes the upper river accessible to migrating salmon.

The fish ladder is the park's engineered marvel -- a series of stepped pools that allow salmon to bypass the river's natural falls and rapids. Without it, the upper reaches of the Stamp River and the waters of Great Central Lake would be unreachable for spawning fish. With it, roughly 500,000 coho, sockeye, and chinook salmon make the journey each year between August and December. The spawning itself happens upstream, in the river's upper reaches and in Great Central Lake, where gravel beds provide the conditions salmon need to lay and fertilize their eggs. The scale of the run transforms the entire valley: bears appear along the riverbanks, eagles perch in the riverside trees, and the water turns thick with fish.

Black bears are a constant presence during salmon season. Drawn by the abundance of protein-rich fish, they wade into the shallows and patrol the riverbanks with a focus that borders on industriousness. For visitors walking the park's two kilometers of trails, a bear sighting is likely rather than lucky during the fall run. The bears are not aggressive toward people -- they are simply occupied -- but the park's relatively compact size means that encounters happen at close range. The combination of rushing water, leaping salmon, and foraging bears makes the Stamp River one of the most vivid wildlife spectacles on Vancouver Island, concentrated into a few hundred meters of accessible riverbank.

The park offers 23 campsites and two kilometers of trails that follow the Stamp River through old-growth and second-growth forest. The trails bring visitors to overlooks above the rapids and the fish ladder, where the sound of falling water is constant and the mist from the cascade hangs in the air. In summer, before the salmon arrive, the river is popular with anglers fishing for steelhead and trout. In autumn, the trails fill with visitors who come specifically to watch the run -- standing on footbridges and rock outcrops, mesmerized by the ancient spectacle of fish fighting their way home. It is a park that earns its visits not through size or grandeur but through the concentrated intensity of what happens in its narrow corridor of river and forest.