Google, for a while now, has had Google Pedometer. Google pedometer is a mapping service that  you use to lay out the course you want or have taken. This way you know how long the trip is.  That way you can see how fast you are going running or Cycling. Its simple to use.

First,  In the 'Jump to' box enter a city to find where you have run or will run.

Second,  Click 'Start recording' and double-click on the map. Start out with Starting point and double-click till you map your route.

There are many numbers available like Mile markers, total distance, and what metric system to use.  Have a nice exercise.