Ankle strengthening walking

In order to get in my 10,000 steps a day I have to hit the trails from 5pm til 6:30 when it is already dark. With a couple of inches of snow on the ground I have no idea what the footing is like as I step. It could be a frozen lump of snow, a branch, or just leaves. This requires you to instantly determine how to adjust you foot, ankle and legs to stay upright. On the last couple hundred yards I'm walking on a trail that slopes to the left. This requires my left ankle to be strong enough not to roll and become sprained.  Last night I saw two deer and a turkey running down the trail. You might be able to see turkey prints in the snow. I got in 8,000 steps in 1.5 hours.
Don't do this on your own.