Yeah I use a Garmin etrex Vista gps, especially when I race. The fastest I've clocked myself at was 82.6 mph. Most scared I've ever been on skiis and the most blood pumping. Couldn't see shit, eyes watered up, everything was shaking for visability, lost 2 lift tickets off my Jacket. Every year I try to go faster, I'd love to hit 90 but I haven't gotten there yet.