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 Missouri 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 -1:29.11 Hailey Simmons Versailles High School 2028 9:39.32 8:10.21 2 -58.72 Elizabeth Seymour Neosho High School 2028 8:30.23 7:31.51 3 -56.87 Isis Greathouse Butler High School 2028 9:09.18 8:12.31 4 -52.68 Mariam Sajid Parkway South High School 2027 8:16.23 7:23.55 5 -52.37 Savannah Swander Lebanon High School 2027 8:32.47 7:40.10 6 -49.85 ...