Quinn Iverson and the 10-year-old Oldenburg gelding Gremlin won the U.S. national Developing Grand Prix Championship held in Wayne, Illinois, on August 24, 2025. Scoring 71.203% in the Grand Prix final after a 70.098% in the preliminary Intermediaire II, Quinn and Gremlin secured the title, continuing their successful partnership of over five years competing in Small and Medium Tours.

Kelly Layne, riding the 10-year-old Hanoverian gelding Living Diamond, finished as reserve champion with a second-place score of 68.431% in the Grand Prix and third in the Intermediaire II. Dawn White-O’Connor on Leon placed third overall, having been runner-up in the Grand Prix final with 68.009%. The competition featured a strong field of riders and horses, with detailed results available on Equestrian Hub.