Want to know the distance you walked/ran/biked but don’t have a GPS-savvy device to track yourself? Gmap Pedometer is a website powered by Google Maps that lets you enter your route without limiting you to driveable roads or places it thinks you should walk, e.g., you can navigate along a bike path.
Tip: first type in the state or country you are in, then further zoom down until you can see the streets and other navigation points to start your route mapping.