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.
TT 2026: Ellis & Clement to continue push towards podiums
Two-time sidecar world champions have impressed since debut in 2024
Snooker: PSM Legion join Blinders at the top
PSM Strollers make it eight wins from nine
Shooting: Faragher superb again at Meary Veg
In-form junior competitor victorious in first skeet league round
Football: Onchan win U18's FA Cup to secure season double
'The O's' also won U18 league crown in January
Netball: Isle of Man set to host Rising Stars Cup
Island to welcome teams from across Europe for competition