Map My Tracks Endurance is a super lightweight, low-power GPS tracker that broadcasts your progress live during long distance sports events like marathons, gran fondo sportives or sailing regattas. Endurance uses as little power as possible and can track live for well over 24 hours on one charge. It's the perfect companion when cycling in a gran fondo sportive or running in a marathon where you want to keep your friends, family or sponsors up to date with your progress with live updates on M