I ran the entire I-5 corridor from Tacoma to Portland at an average of 130mph in an Acura Integra when I was about 18. Fastest trip to Portland I have ever made. Ah, the things we do when we're young. If you want to know how fast on a snowboard, I have no damn idea. I never remember to turn on the GPS tracker while I'm boarding. Ill just go with..... FAST.
I hit 110 in my geo prizm going downhill on I-15 in montana once. Dont even want to know what the RPMs were. 42 in a 25 on my ten speed once. Actually got pulled over thats how I know. High 40s on my board. Its not about the speed on my board, its the Gs that tickle my pickle.