Do you know with version 5.0, you can get your own trail information into Google Earth from your Global Positioning System (GPS) device? The new version now import GPS track information directly from your GPS receiver, quickly and easily, and supports over two hundred GPS receivers, including most outdoor models from Garmin and many models from Magellan. Many more models are supported in NMEA mode for realtime positioning of your location in Earth.
How to import data? Once you've returned from your adventure, getting the data into Earth on Mac and Windows is as easy as plugging in cable from your GPS (typically USB, but sometimes serial) to your computer. In Google Earth, use the Tools->GPS menu to import the data.