Using a GPS tracking device is the easiest and most convenient way to find out how far you ran.
GPS stands for the U.S.-owned Global Positioning System that uses a network of satellites to provide positioning, navigation and timing. Two other major satellite networks exist apart from GPS: Russia’s GLONASS and the European Union’s Galileo. Both systems provide the same type of satellite navigation as GPS.
These systems work by tracking the location of devices here on earth, which is ideal for runners, cyclists and swimmers who all want to know how far they’re going.
One of the best ways to find out how far you ran is by wearing a GPS running watch. Popular Garmin running watches integrate GPS—some models include GLONASS and Galileo support, as well—into the low-profile timepiece.
Click a button on the watch to connect it to a satellite, and the device will ping your location at predetermined time intervals to measure how far you’re running. Some devices will let you modify how often they ping the satellite; the more often the device checks in, the more accurate your distance will be.