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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Isle of Man lose 61-37 to Singapore
Pinnington rescues Ravens against Longridge Town
FC Isle of Man score late equaliser to maintain unbeaten run
FC Isle of Man keen to maintain unbeaten run on home return
Ravens hoping to move further clear of drop zone when they face Longridge Town
Jiu-jitsu: Double European gold for Hayley Curtis
Island fighter secures successes in Rome
Hockey: Southern derby among Mixed Premier League ties
Two points separate top three in Mixed Division One ahead of weekend