[6]Sinjal, often marked as Dinara on maps, is the highest mountain in Croatia with an impressive south-western cliff, several hundred meters high, that is prominently visible from the Dalmatian plain below.

[11] There are no inhabited areas on the mountain itself and human presence consists mostly of small shacks that belong to the herdsmen from the nearby valleys such as that of the Cetina river.

It is six kilometers long and up to 1,700 meters high, providing an interesting landscape for the travelers on the roads in the valley below to view.

The bird species include: common pheasant Phasianus colchicus, common quail Coturnix coturnix, shore lark Eremophila alpestris, redshank Tringa totanus, stone curlew Burhinus oedicnemus, moustached warbler Acrocephalus melanopogon, golden eagle Aquila chrysaetos and short-toed snake eagle Circaetus gallicus.

The relatively well-preserved, extensive and diverse habitats of the Dinara and Svilaja mountains and the Upper Cetina provide a refuge to a number of invertebrate species whose natural habitats have been endangered due to specific living conditions they require, while many of them are endemics and placed on the Red List (certain species of caddisflies, dragonflies, stoneflies, orthoptera, etc.).

The herpetofauna of the Dinara region comprises around 15 species of lizards, snakes and amphibians, some of which are endangered, mostly because their natural habitats have been either reduced in extent or suffered degradation.