Another tracking device, although this one doesn't rely on your phone's battery
http://www.kickstarter.com/projects/activereplay/trace-the-most-advanced-activity-monitor-for-actio
http://www.kickstarter.com/projects/activereplay/trace-the-most-advanced-activity-monitor-for-actio
[h=1]Trace identifies your resort, lifts, and trails, as well as your speed, vert, air, and more. [/h]For skiers and snowboarders, Trace takes AlpineReplay to the next level. All of your data will now have sub-second level of accuracy. In addition to max speed, vertical distance, distance traveled, Calories, number of jumps, and airtime, Trace will also be able to identify tricks like 360s, backflips, and more. And, of course, Trace won’t drain your phone’s battery.
For those who haven’t used AlpineReplay, Trace will tell you which lifts and trails you’ve ridden, along with your speed, vertical, calories, distance, airtime, tricks and more.