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.
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Manx player also part of this year's GB Elite
TT 2026: Tim Reeves to make return in sidecar class
World and British champion to be joined by passenger Melanie Farnier
Boxing: Jade Burden confirms first title fight in April
Manx fighter looking to win Commonwealth Super Featherweight Title in Portsmouth
Young athletes meet with record-breaking track cyclist
Matthew Richardson is guest of honour at 2025 Isle of Man Sports Awards