ANCHORAGE, Alaska - Aliy Zirkle is leading the Iditarod after reaching the Koyukuk checkpoint and taking off again after a four minute break.

The 45-year-old took the lead from Jeff King who pulled into the village about two hours before her on Saturday.

Zirkle is trying for her first win after finishing second in the last three years. She hasn't taken her eight hour layover yet this race. Jeff King has.

Koyukuk is 564 miles from the start of the race. It's 415 miles from the finish line at Nome.

Two other mushers scratched Saturday.

Gerald Sousa dropped out at Galena and Christine Roalofs left in Ruby. Both cited the best interest of their teams.

Four mushers have scratched and one has been disqualified from this year's Iditarod.