Secondary forest road network planning and primary timber extraction systems play very important roles in sustainable forest management. The progression of forest areas in Turkey and the world towards mountains as well as the increase in working obligations have made timber extraction systems gain more importance. The forest areas found in mountainous lands with harsh slopes in Turkey makes timber extraction systems more problematic and more complex. The objective of this study is to develop a model for timber extraction systems using Geographic Information Systems (GIS) analysis considering terrain morphology and secondary forest road network. Additionally the forest road network in Anbardag forest planning unit of Giresun province in Turkey was investigated considering forest road density and forest road spacing. According to obtained results, the forest road length was 226.34 km, forest road density was 11.74 m/ha, forest road spacing was 851.7 m and road coverage was 51% of the study area. Chainsaw-small size cable crane (36.76%) and chainsaw-medium size cable crane (27.94%) were selected as the most suitable timber extraction systems for the steep terrain study area according to our model. They were followed by chainsaw-forest tractor (23.52%), chainsaw-agriculture tractor (10.29%) and chainsaw-sledge yarder (1.49%). The results of this study showed that GIS saved a considerable amount of labor force, time and cost for the evaluation of forest road network as well as the development model for timber extraction system.