Читать книгу Sierra South. Backcountry Trips in California's Sierra Nevada онлайн

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For trip-planning purposes, the trailheads in this book include their own gray-scale map or maps, which show all trips and are based on the United States Geological Survey (USGS) topographic maps or USDA Forest Service wilderness maps. (More information about these ssss1.)

A useful map series for planning is the USDA Forest Service topographic series for most individual wilderness areas. The scale of most maps of this series is 1:63,360 (1 inch = 1 mile), which is very close to that of the former USGS 15’ series (1:62,500), and each conveniently covers the entire wilderness area on one map. However, you may find these maps a bit bulky for the trail.

Most backpackers prefer to use a topographic (topo) map with finer detail than the above overview/planning maps. Hikers typically prefer the USGS 7.5’ series, where the elevation is usually shown in 40-foot contour intervals (although some 7.5’ topos show 80-foot contour intervals or even 20-meter contour intervals) and the scale is 1:24,000 or about 2.625 inches per mile.