Therese Johaug, 33, took the lead immediately, while the former giant star Marit Björgen released a little early.
Some managed for a while, but then it went as usual and Johaug finished the competition alone at the front.
She won in the time of 35 minutes and 51 seconds.
Second was Astrid Öyre Slind, just under a minute later and sister Silje Öyre Slind took third place.
Last year, Johaug won the same race by two minutes down to 41-year-old Björgen who was second that time.
Unexpected winner on the men's side
The men's race was won by Thomas Helland Larsen.
He won by 15 seconds down to the star Hans Christer Holund and third was Gaute Kvåle.
- It was hard, but great to get the answers you wanted, says Helland Larsen to NRK.
Even there, Johaug was high up in the results list, Therese's little brother Karstein Johaug was fifth.
The race was 10.3 kilometers long with about 400 meters of elevation gain.