MapMyRun.com - Go out and run

Allows users to plot their workouts (runs, bike rides, swims, hikes, etc.) on a map displaying real-time distance, calories burned, and elevation profiles. Topo maps and satellite views add to the ability for off road adventures. Visiting a new city or just looking for a new running route in your town? View over 400,000 workout routes! Also included are community stuff like shared workout calendars, training logs, and more!

MapMyRun.com is a community web site for runners and joggers who want to stay healthy, lose weight or train more effectively. MapMyRun.com provides easy-to-use, comprehensive web-based running tools and running maps to measure distance and count calories from running. With running forums, training logs and tips from expert runners and coaches, MapMyRun.com is the site where runners are.

Largest workout database, great visual interface, good use of 2.0 mapping technologies, and just fun!