The Rod of Seven Parts
The Dragonmere (also known as the Lake of Dragons) is a lake on the Dragon Coast at the western edge of the Sea of Fallen Stars. Cormyr and Sembia are on the northern part of this lake, with the Dragon Coast along the south.
The Dragonmere is almost 100 miles from north to south at its widest point. At its narrowest point it is ten miles wide, with Westgate to the south, and Urmlaspyr to the north.