Everytrail is a site where you share your adventures, trips, or workouts with the world. You can easily upload your GPS data and create waypoints which can have notes, photos, and more associated with them. You can leave comments or ask questions on each trip. The waypoints are plotted on a Google map and you can download a kml file to view the trip in Google Earth or download the GPX data to upload the trip data to your own GPS. This trip on Mt Tallac is a good example of what you can do with Everytrail. I’ve actually been on this trail to the summit of Mt Tallac and you can get a feel of the hike with this trip.