AeroTracker is a free watch app for Pebble that lets you track your movements using your phones GPS.
AeroTracker is a stand-alone watch app you can use on it's own, or along with your favorite tracking app.
Show your run time, distance, speed, pace and splits on your wrist. All configurable from the watch, even while on the run.
For even more advanced features, have a look at AeroTrackerPro for Android.
AeroTracker is available in the Pebble app store, or on MyPebbleFaces.com