COMPETE WHENEVER YOU WANT Open Trail Races is the only race timing system that autonomously generates automatic rankings as you pass through each checkpoint. With OTR, races are open for competition 365 × 24. VERY EASY TO USE - Download the OTR app and create your account. - Choose a race. - Download the track from the app and take it to the GPS device with which you will follow the route. - Keep in mind that for a correct registration of your race you should not turn off Bluetooth or GPS loca