Thames Mountain Bike Club is a volunteer club that builds and maintains mountain bike trails around Thames. Its best-known trails are the Moanataiari trails on Moanataiari Creek Road, the first area the club set up after it was formed in March 2011. The club later merged with a Kauaeranga Valley trail group, and its trails now include the Hotoritori area up the valley. Members meet for weekly rides, organised working bees and some rides further afield. The club says its door is open to riders of every experience level, and it draws members from across the Coromandel and beyond.
Membership is the club's main source of trail funding. A junior membership costs $20 a year for riders aged 16 and under, and a family membership costs $70 a year for two adults and up to four children in one household, with extra children at $5 each. Memberships are handled through the Hivepass app, and riders who already use Hivepass through another organisation can join the club from the same app. The fees help pay for trail maintenance, new trail work and the club's agreements with the Department of Conservation, LINZ and the Thames-Coromandel District Council.