Competitors from the club lined up in Cranbrook last month to take part in the Sprint Triathlon, which involved a 300m swim, a 22km bike and a 5km trail run.
President Eric Perrier founded the club in Cranbrook on the May 10, 2011.
He said: “We have rocked the tri planet for 10 years and there’s plenty more to come.
“Hopefully we can celebrate properly later on this year once Covid restrictions are lifted!”
Richard Bysouth, the current club Chairman, added: “We’ve now grown to over 100 members, representing a diverse section of the multisport community, from first-timers to those competing for Team GB Age Groups.”
As part of the 10-year celebrations, two founding members – David Bagge and Ken MacSporran – were made lifetime members for their ‘commitment, representation and dedication’ to the club.
On receiving the accolade, Ken said: “I look forward to a lifetime of cold swims, race T-shirts, early morning bike rides, wobbly leg runs, and, most importantly, continuing to be hugely inspired and motivated by you lovely lot, my good friends and clubmates.”
Suzanne Brogan, a member who joined Tunbridge Wells Triathlon Club during the pandemic, added: “Fantastic achievement, Eric, for creating this amazing club, also very grateful to everyone who has welcomed us to the club this year.”