A GPS can add security to any backcountry trip. However, they are no substitute for knowing how to navigate with a map and compass.

A GPS can tell you where you are and the direction to a point (waypoint) if you have programed it. It can also aide you in following a route if you have programed it. But a GPS can't tell you what the terrain is between where you are and where you want to be. It can't help you pick the safest route.

A GPS is also subject to poor reception, is dependent on batteries, is a piece of electronics that can malfunction or break, and most of all is subject to the quality of the information programed into it.

The waypoints provided for the tours in this guide are for your convenience. They were calculated using National Geographic's TOPO! software. The data was not verified in the field. Locations of landmarks, e.g. huts, that are not shown on topographic maps are especially subject to error. Use this data at your own risk. Remember, there is no substitute for map and compass navigation skills.