I am starting soon (around Sept 17th) a trip through Bosnia and Croatia.
Tentative itinerary is: Zagreb -> Jasenovac -> Banja Luka -> Mrkonjic Grad -> Donji Vakuf -> Sarajevo -> Mostar -> Makarska -> Split
Those are not necessarily all the stops. I plan to do between 50-80km a day, and maybe stop for a rest day or two in Sarajevo.
I have no set date for finishing.
I would be happy to hear from someone who would like to join, or cycling by, or that may have done similar trip before.