MileSplit Staff Apr 24, 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 Montana Boys 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 -15.25 Wyatt Bullcalf Browning High School 2027 1:14.54 59.29 2 -9.69 Bailey Herndon Forsyth High School 2028 1:15.99 1:06.30 3 -7.70 Austin Mangold Simms High School 2028 1:11.44 1:03.74 4 -7.65 Harrison Spethman Loyola Sacred Heart 2027 59.05 51.40 5 -7.52 Cam Hurt Capital High School 2028 1:07.32 59.80 6 -7.46 Aiden Lalum ...