MileSplit Staff May 01, 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 Boys Pole Vault marks compared to their season’s best performances from 2025. Most Improved - Pole Vault Comparing 2026 season to 2025 season Rank Improved Athlete/Team Class 2025 PR 2026 PR 1 +2' 9.00" Miles Walton Harrisburg High School 2027 9-09.00 12-06.00 2 +2' 7.00" Declan Hanten Gettysburg High School 2030 6-00.00 8-07.00 3 +2' 6.00" Ian Larson Huron High School 2028 10-06.00 13-00.00 3 +2' 6.00" Gordon Olson Madison High School 2028 9-00.00 11-06.00 5 +2' 0.00" Dax Giblin Sioux Falls Jefferson High School 2028 8-00.00 10-00.00