If you are a runner/biker/etc.. and want to know the distance you ran/biked/etc.. you can now use this handy tool called Gmaps Pedometer. You zoom in to the area where you ran/bikes/etc.. and then you can mark you route and it will tell you the ditance you rant. Here is the link [Link]

Note: when you click on the link and go to the page, once you get there press satellite on the top right. When you find the location you ran/biked/etc.. click on Start Recording then double click your starting point on the map and then just keep double clicking on the route you took, it will draw lines for you and measure your distance.