Skyreach is a castle in Dorne, the region controlled by House Martell of Sunspear. The castle is located in the north-west of Dorne near the border with the Stormlands. It is east of Yronwood near the Dornish end of Prince's Pass.
In the books
In the A Song of Ice and Fire novels, Skyreach is the seat of House Fowler, who are close allies of House Martell.
- Skyreach at A Wiki of Ice and Fire (spoilers from the books)