Brač is the largest Dalmatian island. It is approximately 40 km and 12 km wide on average. With a total area of 395 km ² is the third largest island in the Adriatic. It is separated from the mainland by Brac channel (maximum depth 78m) from 6 to 13 km. To the west it is separated from the island of Šolta by “Split sea doors”, and to the south of the island with Hvar channel (91 meters deep).
The island is built from carbon and limestone rocks, and came into existence about 100 million years to the Cretaceous period, but only became an island in the Holocene. Erosion and subsidence, and other types of soil, so that it now consists of limestone, sandstone, breccia, clay and red soil.
The highest peak is Vidova Gora, the highest peak of all Adriatic islands (778 m / nm).
