The event takes in a 750m lake swim, 20km road cycle and 5km run at Keynes Country Park near Cirencester, Gloucestershire. It is open to individuals and to relay teams of three.
Entrants will need to give a minimum donation, which includes entry fees. Forty team places have been reserved on a first-come, first-served basis.
The Benevolent hopes to raise £20,000 towards its work supporting former members of the drinks industry in need.
For more details, contact chief executive Cheng Loo on 0207 089 3888 or e-mail firstname.lastname@example.org.