My wife Toni is a walking machine....she grew up in a European heritage family that walks all the time. Even today in there late 80's her parents walk a few miles every single day.
(My family was, sadly, not that way. I had never met a family that just 'went for a walk' together before I met her..)
She doesn't have great knee health..but still does a lot of hiking and walking (but NO running..no workie). It's a bit annoying for her to have people ask if she's doing races with me...no she's not running marathons. But, she goes to the Y 6 days a week and does low-impact aerobics, cardio and weight training
When I signed up for Tacoma she brought up the idea of her walking the half marathon.
I was like ...'!!?! what !?!?!'....sure!'
She was not sure she could do it in the time limit (which is 4 hours). So, I put a tracking app on her phone and today we went for a fairly normal walk 1.5 mile walk..(maybe a bit faster) that we always do. She learned we did a 16:45 pace. (4 hours is only a 18+ minute pace.)
With all the hiking she does during the week I know she can do it. I showed her the Hal Higdon half marathon walking training schedule and it was kind of a joke for her. The midweek hilly hikes she can knock out any time were much MUCH more intense. The only thing she's missing is the long walks at a fast pace ..thus giving her the confidence that she can do it under 4 hours..this distance is not in question.
Tacoma is _perfect_: the half marathon is, like the full, a point to point run..starting at the marathon halfway point! Since my finish time is a bit under 4 hours, and I expect Toni will probably be somewhere around there too, it will mean we get to the finish at around the same time! So fun!