Anna Hall (Valor Christian) and Arria Minor (Denver East) were each named to USA Track and Field's under-20 roster, and will represent their country at the 2018 IAAF World U20 Championships in Finland next month.
Both girls will be seniors at their schools this fall.
The U20 World Championships are being held in Tampere, Finland from July 10-15.
Hall will be competing in the heptathlon, an event she won at the USATF Junior Outdoor Championships earlier this month. Hall set the national high school heptathlon record at the Great Southwest Track and Field Classic on June 1, scoring 5,798 points.
During the state championships this past spring, Hall won the long jump, and the 100 and 300 hurdles, setting a state meet record for Class 4A, and also breaking the previous all-classification record by finishing in 40.76. She was also second in the 200.
Minor will represent the U.S. as part of the relay pool in the 4x400. She finished third in the event at the USATF Junior Outdoor Championships, behind two collegiate runners.
Minor's time of 51.92 in the 400 is the fastest by a high school girl this season. She also had the fastest indoor time (52.74) by a high school girl.
Minor was named the 5A girls track athlete of the year as part of the all-state teams after the season.
The duo now give Colorado three representatives at the 2018 IAAF World U20 Championships. Discovery Canyon's Lauren Gale will represent Canada.