Both the men's and women's marks went down in Duluth on Sunday.
He's out to break his own course record this weekend.
American Jason Delaney did it.
He came to the Pine Tree State to climb a mountain.
The Kenyan had to fight hard for his win.
The men's winner set a new course record and PR.
Kenyans are poised to strike in the Czech capital.
They are looking to take down Tsegaye Kebede's course record.
She also set the course record.
She set a new course record by three tenths of a second.