You Should Be Downloading Your Trail Maps

On most trips and in most locations, to navigate hikers rely primarily on my paper topographic maps, ABC (altimeter, barometer, compass) or GPS watch, and magnetic compass. As both a backup and supplement to these tools, smartphones have GPS apps like CalTopo (good) or Gaia GPS (better), or AllTrails that you can use to access downloaded map data for offline use. A GPS...

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