Back in the 1990’s when I was doing IVV Wanderings (marches) I could walk a 20K (12+ miles) in about 2:50:00, or an average pace of 8:30/K (13:41/M). I think if I power-walked regularly I could probably get back to this speed.
I walked a IVV (International Wandering Club) marathon in 1995 in just under 6 hours. I should note that I jogged some of the down hill sections though.
The main reason that I am curious about my walking speed is that I anticipate having to walk some of the uphill sections of the 50K in May. I am thinking I should train my long runs with this in mind.

DATE: 4:07 AM
oh yeah, practice your walking!!!
DATE: 7:37 PM
Planning a walking strategy sounds like a great idea!