MileSplit Staff Apr 10, 2026 PRO See the rest of this article Access the complete article with MileSplit PRO. Subscribe to keep reading Already a subscriber? Log in. Improvement Rankings: Top South Dakota Girls 1600m marks compared to their season’s best performances from 2025. Most Improved - 1600 Meter Run Comparing 2026 season to 2025 season Rank Improved Athlete/Team Class 2025 PR 2026 PR 1 -50.31 Sadie Davis Wall High School 2027 6:42.41 5:52.10 2 -44.12 Clara Herreid Aberdeen Christian School 2029 7:16.76 6:32.64 3 -26.65 Calla Wiese Flandreau High School 2030 6:01.55 5:34.90 4 -24.93 Ava Crooks Deubrook Area High School 2029 6:41.65 6:16.72 5 -20.58 Aliza Addy Canistota High School 2028 6:58.59 6:38.01 6 -17.23 ...