The map should update every few minutes when the signal is strong, but expect drop-out when GPS signal is lost. However, you cannot track absolutely anybody with the GPS, as the runner will need to approve your email address in the app before they start. The annual event draws over 1,000 athletes every year.

If the participant is carrying a phone, they can also choose to share their actual live location by using GPS, which must be enabled in advance of the race getting underway. FIND BY STATE Featured race April 19 Steamtown Marathon Stands as one of the Fastest Boston Marathon Qualifers by sport masters in interviews The Steamtown Marathon is held in northeastern Pennsylvania on the Sunday before Columbus Day. The app will give a notification each time the runner completes a 5km split, along with issuing a predicted finish time based on their pace. Users can track an unlimited number of runners, which also includes elite athletes and celebrities, based on the timing chip located in their bibs.

Hit ‘add’ to include them on your tracking list.Search for a participant with either their name or bib number.The app lets those at home follow loved ones (Picture: Bonnie Britain/SOPA Images/LightRocket via Getty Images)

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