Have you seen MapMyWalk.com?

It lets you plot where you walk, so you know how far you went. This is how I know that James walked 1.75 miles on Friday! That's a long walk for little legs! Blake took him for the walk while I stayed home in a flexeril-induced fog. The entire walk was 2 miles, but Blake carried him for the 1/4 mile that was on a busy street. He then slept really late on Saturday. We found something that wears him out. But, he was still asking for another walk the next day. This site would have been helpful when I was training for marathons, as it even has elevation reports. But, there are no marathons on the horizon for a while.