well that is a very easy route in fact .Becouse there is only one road which is connecting west to the south part of Turkey and all the sign boards are quite readable for the foreigners. So any map can work out for you. but i recommend you to carry on till to Kas not kalkan only.
Don't miss Patara on your travels. It consists of a silted up harbour and miles of golden sand. There are Roman ruins everywhere but little else. We had a lovely Meze at a family run establishment near the bus terminus which was a wooden hut.