You and Charles Dickens. He was estimated to walk 12 miles a day at almost 5mph, and would speed up going up hills! http://lukemckernan.com/2013/06/09/walking-with-ch...
I walk at about 3 mph, and slow on the hills :)
Ok, and Dickens didn't set running age group records either:)
Was just over 4 mph today for 4 miles. Get a cortisone shot on Monday. That will determine if I can start running again. Hope the knee feels ok for a few months. Only a temporary masking of the problem, but a few more months of running would be great.