Kate Hall erased the oldest girls' high school record in track and field[broken anchor] when the 2015 high school senior from Maine leaped 22 feet, 5 inches outdoors at New Balance Outdoor Nationals in June 2015. Hall's record-breaking long jump has surpassed the minimum standard for the 2016 Rio Olympics set by the international track federation (IAAF). It also made her the No. 6-ranked American female long jumper in 2015, No. 16 in the world in 2016 and No. 6-ranked American female long jumper - No. 18 in the world in 2017.[5][6]
Hall competed in the final of the long jump where she qualified for the final at 2016 United States Olympic Trials (track and field) jumped 6.59 m (21 ft 7+1⁄4 in) and in the final placed 10th with a best of 6.34 m (20 ft 9+1⁄2 in).[7][8]
In January 2021, Hall-Harnden announced recovering from ACL injury.[9][10]
Hall, who broke the national girls high school record in the long jump less than a year ago, in her first event as a Cyclone at the Big 4 Duals on January 23, 2016, ran the second fastest 60-meter dash time in ISU history (7.40 seconds).[16][17][18]
She had a high school personal best long jump of 22 feet 5 inches.[22] Kate Hall's national record[broken anchor] leap of 6.835 m (22 ft 5 in) in the girls long jump won her a title at the 2015 New Balance Nationals Outdoor on Sunday in Greensboro, North Carolina, and broke a 39-year-old national high school record. Hall placed third in 100 meters at the 2015 New Balance Nationals Outdoor.[23]
Hall defended her New England Meet of Champions Long jump crown and set a Maine state record with a 6.38 m (20 ft 11 in) at the 70th New England Interscholastic Outdoor Track and Field Championship in May 2015.
She was named Maine Girls Track & Field Athlete of the Year by USA Today High School Sports in June 2015. The Gatorade State Girls Track & Field Athletes of the Year were selected based on athletic production and impact in the 2014–15 season.[24]
The Gatorade Company, in collaboration with USA TODAY High School Sports, on June 19, 2014, announced selected her as its 2013–14 Gatorade Maine Girls Track & Field Athlete of the Year. She is the first Gatorade Maine Girls Track & Field Athlete of the Year to be chosen from Lake Region High School.[25]
Hall won 2015 Maine State Track and Field Championship Class B State titles in long jump (20' 4.75), 200 meters (24.82), 100 meters (11.69), and placed 4th in 4x100 meters relay with Danica Chadwick, Hannah Chadwick, Sarah Hancock, Kate Hall.