Rainbow trout
Oncorhynchus mykiss
Rainbow trout are widely stocked into small stillwater fisheries and reservoirs throughout Wales. Rainbow trout do not breed in Wales and stocked fish are triploids.
Rainbow trout grow quickly in Welsh lakes, where they thrive in the cold water, providing great trout fishing. Fly fishing is the favourite method for them, although some waters are any method.
Rainbows provide fantastic fishing on our larger reservoirs, with fish often of a high average size – 45cm plus. There are several stocked variations of rainbow trout – including blue trout and golden trout.
Find places to go trout fishing in Wales here.

Summer Coarse Fishing Tips: How To Beat The Heat
While blue skies and sunny waters bring out fair weather anglers in droves, high summer can be a tough time…
Read More
Hot Weather Guidance - Freshwater Angling
With another spell of extremely warm weather forecast, NRW are urging freshwater anglers to take extra care while fishing to…
Read More
Take A Friend Fishing in Wales! 26th July - 31st August 2025 inclusive
Summer is a fantastic time to get outdoors and enjoy some time next to the water! Taking a friend or…
Read More