Red Lake is a castle in the Reach, the region controlled by House Tyrell of Highgarden. The castle is located north-west of Highgarden and due west of Goldengrove, near the border with the Westerlands.
In the books
In the A Song of Ice and Fire novels, Red Lake is the seat of House Crane. It is located along the shores of a large lake of the same name.
- Lake Red Lake at A Wiki of Ice and Fire (spoilers from the books)
Old Oak · Red Lake · Goldengrove · Bitterbridge · Tumbleton · Grassy Vale · Cider Hall · Ashford · Horn Hill · Brightwater Keep · Bandallon · Honeyholt · Oldtown (The Citadel · The Hightower) · Uplands · Blackcrown · Three Towers · Sun House · The Arbor