MileSplit Staff Apr 17, 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 North Carolina Girls 400m marks compared to their season’s best performances from 2025. Most Improved - 400 Meter Dash Comparing 2026 season to 2025 season Rank Improved Athlete/Team Class 2025 PR 2026 PR 1 -24.26 Courtney Smith Research Triangle 2028 1:55.37 1:31.11 2 -21.47 Mary Abney Langtree Charter Academy 2028 1:35.67 1:14.20 3 -19.44 Kamryn Rowe Camden County 2028 1:29.70 1:10.26 4 -14.51 Jayla Williams Durham School of the Arts 2027 1:27.56 1:13.05 5 -13.66 Lael Miller New Hanover 2027 1:18.01 1:04.35 6 -12.95 Braelyn B...