If you are arriving with your own transport easiest way to get to Sumartin would be thru the Makarska.

Car-ferry isn't big but durring the summer it drives every hour and the trip last only a 20 minutes. Find more about schedule of car-ferries here.

Longer way should be route Split - Supetar - Sumartin. As I said before if you have a time and your own transport take a time to see beautiful island of Brac on your way to Villa Anita in Sumartin.

Split Sumartin
From highway A1 - Split - Supetar - Sumartin
Makarska-Sumartin
From highway A1 - Makarska - Sumartin
Sumartin island Brac
Villa Anita - Sumartin island Brac