Rainbow Trout

Habitat Distribution

• Introduced, not native — no self-sustaining wild populations exist in Ireland despite occasional recorded spawning events.
• Found almost exclusively in managed put-and-take stillwaters: spring-fed lakes, reservoirs, and purpose-built fishery ponds spread across Wicklow, Waterford, Westmeath, Cavan, Laois, Clare, Kildare, Kilkenny, Kerry and beyond.
• More tolerant of warmer water than brown trout, which is why they thrive in the shallower, nutrient-rich lakes that brown trout would struggle in during summer.
• A small number of larger loughs — including some Midland lakes — hold stocked rainbows alongside wild browns, where holdover fish can grow quickly on rich invertebrate food.

Key Locations

• Annamoe Trout Fishery, Co. Wicklow — a well-regarded spring-fed lake in the Wicklow Mountains, short drive from Dublin.
• Carrigavantry Reservoir and Knockaderry Reservoir, Co. Waterford — managed fly-fishing venues in the southeast.
• Derrymore Springs, Co. Westmeath — spring-fed fishery in the Midlands known for clear water and active fish.
• Laois Angling Centre, Co. Laois — a central Ireland venue catering to both fly and lure anglers.
• Corkagh Park Fishery, Co. Dublin — one of the most accessible rainbow trout venues for anglers based in the capital.

Specific Spots

• In spring-fed fisheries, look for the inlet channels and oxygenated shallows — stocked fish gravitate toward moving, well-oxygenated water.
• Weed edges and drop-offs hold fish that have settled after stocking; they use the cover the same way a wild trout would use a undercut bank.
• On windier days, fish the downwind shore of any stillwater — wind lanes concentrate hatching insects and drifting food, pulling trout to the surface.
• In warmer months, deeper water near dam walls or spring upwellings gives fish a thermal refuge; a slow retrieve through these zones often outfishes the shallows.