Walking App
 

I am looking for a walking App that will track my walk across America. So if I walk 3 miles today it will put me three miles from the ocean and if I walk 4 miles tomorrow I will be 7 miles from the ocean and so on until I make it from one side of the country to another.

Is there such an app out there?

I'm very new to apps but this is the one I want if it is available.

Thanks