Huge contrast of yellow aspen ("Populus tremuloides") and ponderosa pine ("Pinus ponderosa") on the northeast side of the San Francisco Peaks, as seen from Forest Road 151. For details on the drive, go to www.fs.fed.us/r3/coconino/recreation/peaks/around-peaks-s.... Taken by Brady Smith on 9-30-09. Credit: USDA Forest Service, Coconino National Forest.