- Hi all...I ran the Rock and Roll Philly last week and my Garmin was way off the entire race. My pace and distance were really far off and it really messed with my head! I turned it on as I went over the start line and off as soon as I crossed the finish. My watch had me running 13.9 miles, not 13.1. I knew that in the city it would be off but I thought it would recalibrate once I was along the river away from the buildings. Is this my particular watch's problem? Is there something that can be done? I have a Fenix 5x sapphire. Thank you!!