I did very little walking today, and even less with a pedometer on (0.9 km), but I rode my bike 9 km. I’m now at 1517.6 km… which by my reckoning (and Google Mars’s) is 50.0% of the way from Viking 2 to MSL!
That’s taken 247 days. If the second half takes 247 more I’ll be done May 15 of next year.
MarsWalk kmz file (for Google Earth — View >> Explore >> Mars)