Ben Nevis in Scotland, about 4k feet
Somewhere around Canmore, in Alberta, we may have gone up to 7k feet or so but I would have to ask the people
on that trip how high we went. I don't recall exactly, but it was a long hike, maybe 4 or 6 hours.
I enjoy watching documentaries about climbers who have died in places like K2 or Everest.
Not because I enjoy learning about the deaths, but, because I know it's dangerous and death is a reality for some.