Hillingdon Triathletes provided nine of the 400 teams taking part in the National Triathlon Relay Championships at Holme Pierrepoint in Nottingham.
All competitors had to swim, cycle and run the sprint distance event before handing over a baton.
The club's stars of the day were Steve Gardner, Ian Birch, Richard Nash and Dave Wardle, who came through an incredibly tight race to win the over-50 super vets title. They trailed by six minutes after the swim leg but stormed into a 30-second lead after all four members completed the nine mile bike ride.
The strongest runners, Birch and Nash, took on the last two legs and they hung on to win by just seven seconds.
The quickest Triathletes team was the senior men's one made up of Mark Edwards, Tom Korff, Oliver Jones and John Levison, who combined for a time of 3hrs 35mins 41secs to finish 65th, while Leon Harris, Steve Walsh, Mike Coates and Roger Fowkes were 86th in 3.44.07. The club's third team in this category was Paul Gardner, Dylan Slaney, Simon Kearns and Melissa Arkinstall, who stepped in due to illness, who finished 103rd in 3.53.59.
A mixed team of Michelle Ford, Michelle O'Dea, Stuart Reilly and Oliver Jones was not far away from a medal with ninth place in 3.39.14 and Annie Birch, Gillian McAllister, Nick Wilson and Alistair Motion came 79th in 4.23.54.
In the open event Emma Bayliss, John Laird, Danny Attias and Andrew Taube were 42nd in 4.16.48 and despite carrying one injured athlete the vets team of Chris Pinnell, Colin Smith, Mike Diggins and Simon Claridge was 13th in 3.37.16.
The women's team of O'Neill, Arkin-stall, Suzanne Hopper and Jenny Shorrocks was eighth in 3.43.41.
A week earlier club members achieved a number of successes during a hot and hectic weekend.
At the Milton Keynes Olympic Distance Triathlon Shorrocks and Ford both won their age groups, recording 2hrs 10mins 56secs and 2.22.34 respectively. O'Dea was third in her age group in 2.19.04 while Dave Bishop was 54th in 2.31.09 and Martin Bowd was 59th in 2.34.42.
Mark Edwards was runner-up in the Thame Sprint Distance event and Nash won the super vet age group.
Racing at Dorney Lake in Eton, Hopper finished third overall and first in her age category in the National Police Triathlon Championships.
The Bananaman Triathlon which involved an 800m swim, 30km cycle and 7.5km run, resulted in victory for Birch in the super vet class in 1.41.32 and O'Neill in the women's section in 1.43.17. Levi-son returned to form after illness by finishing second in his age group in 1.40.10.
Miriam Schmitt was the 12th woman home in the Bath StandardTriathlon over a 1.5km swim, 40km cycle and 10km run.
In the Triathlon Challenge Team Realy competition at Dorney Lake Hillingdon Triathletes finished third in the women's event thanks to Arkinstall, O'Neill and Hopper. A mixed team of Jones, Emma Bayliss and Levison finished eighth.
In the Saunders Mountain Marathon held in the Lake District over two days, Brian Leach and John Myall came second in the veteran age group in the Bowfell Class.