Williams produced an impressive run to set a new personal best time of 1:17.13 to finish behind Chard’s Wayne Loveridge.
At the Bridgwater 10k on the same day, fellow Plymouth Harrier Ami Yetton finished as second female and 14th overall in 40.01 minutes.
Plymouth Harriers enjoyed a strong showing in the 10k event and, including Yetton, had five finishers in the top 14.
Alex Peyton-Jones was fifth overall (35.38), with Raymond Tew seventh, Steve Hill eighth and Justin Smith 12th. Team-mates Terry Bartlett and Leigh Robinson also finished in the top 45.
At the Treggy 7 at Launceston, Storm Plymouth’s Lauren Knox came fourth female, with Tavistock’s Edward Horn sixth overall in 42.16 minutes.
Meanwhile, a host of athletes from the Armada region represented England Masters in their battle with the Celtic Masters at the Maidenhead Half Marathon at the weekend.
Tavistock’s Sam Lake, Jodi Fisk, Allan Herdman and Andy Houghton, Erme Valley’s Alison Thorn and Alison Engledew and Plymouth Musketeers Rodney Hillebrandt all pulled on the England vest.
Lake clocked a gun time of 1:27.36 to finish seventh in the women’s V40 category, Thorn was sixth in the V45 category with 1:28.39, Fisk was sixth in the V35 category with 1:29.06, Herdman took fourth in the V65 section with 1:31.46, Houghton came sixth in the V70 category in 1:40.46, Engledew was sixth in the V60 section with 1:47.54, while Hillebrandt took 10th in the V70 age group in 1:51.19 (all gun times).
On the track, there was some good end of season performances at the South West League meeting at Exeter.
Tavistock’s Emma Ryder set a season’s best time of 2:16.94 to win the senior women’s 800m, while also on the track there was a season’s best time of 27.33 for Erme Valley’s Ruth Green as she came second in the under-17 200m, while Tavistock’s Joely Bytheway was second in the women’s 400m hurdles.
In the field events, Erme Valley’s Adam Dingley claimed a new PB of 4.78m to win the under-13 boys’ A long jump, while City of Plymouth’s Rosie Northcott came second in the under-13 girls’ long jump with 4.08m and she also came second in the high jump with 1.30m.
City of Plymouth’s Zoe Crutchley came second in the senior women’s hammer with 30.59, while Tavistock’s Phoebe Milburn won the under-17 hammer with a PB of 28.85m and team-mate enjoyed the best throw in the under-13 girls’ shot with a PB of 7.82m.