20 km

In 7:12. He's about 8 minutes ahead of schedule, but he's probably going to adjust his work in this hour and the next. His plan called for 3 km and then 1 km, but my reading of what he told me at the 20-km rest is that he'll be happy to do 4 km between the hours.

He's done 47% of the distance, and has 22.2 km left.