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length in United Kingdom — 32 km
Recorded 2 catches here. Most commonly caught: Brown trout. Peak season: May.
River Afon Alwen — one of the area's fishing spots. About 32 km long. A smart bite calendar — moon phase, atmospheric pressure, and weather combined into an hourly fish-activity forecast for the coming days. The river runs through Conwy, Denbighshire and Gwynedd — the bite forecast is computed for each stretch separately, from the weather of its own region.