Have you seen this web site? If you're walking or running or biking for fitness, it's very helpful. It's a cycling site, but you can use their mapper for anything. I used it yesterday to figure out different routes through my neighborhood to come in at 1, 2, and 3 miles.
You put in your address or wherever you're going to be running/walking and it brings up a map of the area, then you click on points where your path turns, like intersections or whatever, and click around your whole route, then it calculates the number of miles. Pretty sweet. Very satisfying to know what turns around the old neighborhood total a mile or where I'm crossing over to 2 miles, or whatever. More ticky-ticky. Very engrossing.
(I'm using ticky-ticky to mean busy little clicking things on web sites, like the water drinking clicker on the Weight Watchers' site or the map waypoints. I hope it doesn't mean some renigade kind of sex in a Polynesian tribal language. Or at least I hope no one here knows that language.)
Anyway, happy mapping. Thought I'd share. No, Mapmyride.com is *not* a science fair sponsor. ;D ;D