I was playing around with GPS logs from skiing. Since I am not using an app on my phone, but an actual GPS datalogger (quite a bit more sensitive than phone based GPS apps) I need to feed the data into 3rd party apps to get anything useful or fun out of it.
http://www.gpsvisualizer.com/ is able to take the logs and turn them into something interesting. Like the picture of the runs at Copper Mountain coded by speed.
I also tried a couple Windows PC apps, but they all kind of sucked. But still fun looking at various bits of data.