Here is some info on a great GPS track sharing and conversion web site that is free to use.
“GPSies.com is a free outdoor track community with worldwide about 1.000.000 trekking, running, walking, cycling, mountainbiking, skating, sailing (and more activities) tracks.”
“GPSies allows you to upload, convert, view and download tracks which have been recorded by a GPS device. Tracks are visible on a map(as in Google earth) and similar options are also available on the site (zoom, satellite or map mode etc.). The tracks are classified based on the mode of transport (by foot, bike, motor and others). Uploaded tracks can be changed by entering the original user id used to create it.”