The Usk flows through one of the U.K.'s great beauty spots, the Breacon Beacon mountains, into the Bristol Channel. It is probably the most prolific salmon river in Wales and it gets sea-run browns. But it is most famous for its dry flyfishing for resident browns. Sizes are in the same class as those in the Teifi. It is the regularity and diversity of its fly hatches that make the river so popular—and a dry fly angler's delight. They start early, with often dense spring hatches of March Brown bringing every fish in the river to the surface. Heavy hatches of Yellow Sally will relieve hot summer days. Hatches of caddis will bring up not only the resident browns but also their big sea-run cousins in the dusk. Good base: Abergavenny.
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