Being new to running I don't have the fancy gizmo's to figure my route mileage. I use to drive the route in my truck to figure it out. Now I can mix my run's up throughout the neighborhood using TrailRunner before I jog and know exactly how many miles I'll be running.

It does take some time and patience to figure it out, but once you've done it a few times it's a piece of cake. It can be a little slow at times, but considering the map detail I would almost expect it to be.