A general method of comparing escape route effectiveness in any terrain using any fire prediction method is presented. Information gathered from the South Canyon fire that burned in Western Colorado during July, 1994 and the Mann Gulch Fire that burned in central Montana during August, 1949 is used to estimate the average rate of travel of firefighters over rough terrain. This information is compared against predicted fire spread rates to gauge escape route effectiveness as a function of terrain slope, wind speed and fuel type. Type I, II and III track driven tractor travel rates are include in the analysis. It is intended that this analysis be used by firefighting crews to evaluate safety zone effectiveness for their specific situations. It is also envisioned that the method could be used by fire operations specialists to assess relative risk associated with alternate firefighting tactical options.