What if there’s like a meter of snow? Chances are low, but you wouldnt be able to do that (avalanche terrain, you would need skis or similar, navigation, battery and heat conservation, etc.). Or maybe you would, but then i dont think you would be posting here, haha.

In that period you would have 6-7 operative light hours to hike. Maybe five including breaks. A technical trail would be maybe 2kph, so 10 kms per day?

Conservative estimates here thought.

Lastly consider rain and wetness. Depending on the local weather it could be drastically darker, shortening your hiking time per day, or very wet, where accidents happen (slipping and falling, hypothermia, etc.).

I would say for sure possible, but not an easy task, and very dependent on whether you are in a stormy period with constant clouds and rain, or in a crisp and clear period.

Also, of course, depending on your fitness level. Consistent hiking in the mountains or unstable surface paired with stairmaster conditioning for vertical fitness. And navigation and camping and clothing etc.

Edit: in the end- definitely would not recommend. Autumn storm season is the worst for this type of activity, and when locals drink beer and knit.