Mach 51
I got an email to explore my Google Maps timeline. I checked it out and noticed there was a "dot" out in the ocean west of Oregon. Decided to check it out. Apparently, according to Google, back in August of 2017 I "drove" 1,993 miles in 21 minutes to that location. Coming home was even more impressive - 1,986 miles in 3 minutes. That's 39,720 miles per hour or a little over Mach 51 (speed of sound - Mach 1 - is 767.269 miles per hour)