Abstract: A method for calculating average skidding cost and optimal road and landing spacing under linear and non-linear conditions is presented. Higher mathematics, tabular solutions, calculation of average skidding distances and assumptions of skidding costs which are directly proportional to distance are not necessary. With micro-computers, simple programs can be written to directly sum up the skidding costs in an elementary, easy to follow procedure. Examples for radial and right-angle skidding patterns, and situations where uphill skidding costs differ from downhill skidding costs are presented.