Kaiser is the first musher of Yup'ik descent to win the Iditarod sled dog race. His win is a significant point of pride for Alaska's indigenous people.
The rookie musher and her team of rock-star racers, with their own social media following, face heavy snow, subzero temperatures and 938 miles of Alaskan wilderness.
Matanuska-Susitna Borough says there is no evidence that animals were mistreated at a kennel owned by Dallas Seavey. Seavey faced allegations of cruelty, after also being accused of doping.
Under pressure from competitors, the race committee said the 30-year-old musher is under suspicion of giving his dogs the drug tramadol in this year's race. Seavey has denied any wrongdoing.
At the end of this year's annual run to Nome, Alaska, several dogs from a single team tested positive for a banned painkiller, the race board says.
Seavey, who previously won the Iditarod in 2013 and 2004, became the fastest and the oldest musher to win the race. He also beat his son, defending champion Dallas Seavey.
For the third year in a row, Dallas Seavey is the first musher to reach Nome, Alaska, winning his fourth Iditarod championship overall.
Multiple dogs were injured Saturday morning after a snowmobiler repeatedly drove towards Aliy Zirkle, Jeff King and their teams. Nash, a 3-year-old male on King's team, was killed in the attack.