Winter or summer? In winter we ski, and average is from 12 to 40 km in untracked terrain, probably about 25. It depends on the terrain and skiing conditions. My dog is a Border collie and he too pulls a pulk, in winter about 25 kilos.

In the summer he too like FinallyME's dog carries a backpack. The distance covered is also here depending on the terrain, but on typical mountain tracks without too much climbing it is about 20km. Then the pack is 25% of his total weight. The summer distances have less variation since the walking conditions does not wary as much as in the winter. I calculate 4km per hour on good flat tracks, 3km if the track has some height difference of more than 500m. This includes time for drinking water every hour and one stop for eating food. The dog is always ahead of us, he is not the slow one, we are!

My slogan is: a tour without a dog is half as fun as a tour with a dog. They enjoy the outdoors even more than we, never gets tired of it.
Otto