Rimmer, who had finished second last year, took the title by nearly five minutes on the hilly course that starts and finishes at Saltash Rugby Club on Moorlands Lane.
He clocked 1:16.04, with James Dwyer second in 1:20.59 and Romsey’s Matthew Brown third in 1:24.02.
There was a good battle for the first over-50 athlete home with Anthony Mee just edging out host club Tamar Trotters’ Paul Gregg. Mee was fourth overall in 1:24.17, with Gregg fifth in 1:24.21. Another Tamar Trotter, James Blight, was sixth.
The women’s race was won by Katie Deards in 1:30.11, with Buckley Running Club’s Jen Adams second in 1:32.44, Fleur Peoples third in 1:25.51 and Erme Valley Harriers’ Sarah Hirons fourth in 1:36.43.
Competitors had to brave some heavy showers in between spells of sunshine.
Full results can be found HERE.