True....there is no speed limit on the AZ state books for the Parker Strip, day or night. However......and I am speaking from an unfortunate event that ultimatley had my night cruise ending up behind grey bars the police can pull you over for any speed they consider unsafe. In my case it was 32 mph, I said Sir, "there is no speed limit on the Strip at night" and he said "there is a speed limit at night and I enforce it, it's 25mph". If you drive your boat on the Strip at night you will get pulled over at some point, everyone does. During the day you can do what you want as long as you don't act like a a jacka$$. After dark, you will eventually get pulled over for just driving at night. Took a few years before I drove at night again, it is a very cool experience. Be safe, extremely sober and drive slow.