This is the series of Oregon USGS topographic maps that most hikers, fishers, hunters and outdoor adventurers are familiar with, also known as the "7.5' minute maps". These are the most detailed topographic maps of Oregon from the USGS, and the best tool for figuring out the shape of the land using contour lines. Hills, depressions, cliffs, plateaus, and other physical features are clearly marked on these maps, while colors and symbols indicate whether these hills are wooded or clear. Roads, trails, power lines and shelters are also marked. These USGS Oregon topo maps are all approximately 22" x 27". This is about a 6 mile by 9 mile area for each map.