Top teams in the 2019 Iditarod Trail Sled Dog Race are reaching the Yukon River on Friday as the race enters its fifth day, with snow and more warm temperatures in the forecast. Girdwood's Nicolas Petit and Norwegian-by-way-of-Willow musher Joar Leifseth Ulsom have continued to leapfrog each other, with Nic winning a five-course meal in Anvik. We hear more about the different strategies as they came into focus earlier in the race and take a listener question about team positions for dogs.