You should take Kavacik exit from TEM Highway (from Europe to Asia direction, the first exit after the bridge in Asian side) Follow always the sign Riva. After 10 km. you will see the sign Mahmut Sevket Pasa to the right. Follow the sign. After 3 km you will reach village Mahmut Sevket Pasa. You should drive strait, untill out of the villige.
You will pass the cemetery with a fountain on the left side. 150 m after cemetery you should take the forest road on the left side. After driving 400m in forest road you will reach Kulindag.
From Kavacik there is a bus with number 136 with 15 minutes intervalls. From Kavacik to Mahmut Sevket Pasa Vilige it takes 45 minutes. This bus is passing from Beykoz as well. If you take the bus from Beykoz, it takes 25 minutes to Mahmut Sevket Pasa.