Simon Skillicorn won Saturday's Glen Mona Horse shoe by over four minutes.
Tom Cringle, who is his nearest rival in the league this year, was second, and Ian Gale was third.
Cal Partington claimed the women's race ahead of last year's winner Rose Hooton. Bridget Kaneen was third.
Basketball: Wolves and Jets to meet in championship final
They overcome Cavaliers and Cannons Elite in last-four phase
Triathlon: Andrew and Clara Isaac defend sprint titles
Husband and wife pairing take wins for third year running
Football: Castletown close in again for Division 2 promotion tussle
Marown also still in the mix after win at Douglas & District
TT 2026: Rob Hodson extends ties with SMT Racing
Rider making switch to Ducati power in Supersport class
Hockey: Mixed results for IoM at county championships
Manx men's team finishes seventh in Nottingham