The annual Mystery Box Rally starts from Dubbo on Saturday, November 25.
Teams drive their own 25+ year-old vehicles along a mystery route in the five day challenge, in aid of cancer research.
Teams are given their itinerary each morning, with the route following a loop starting and finishing at the same location, but all other details are kept under wraps.
Vehicles should cost no more than $1000, and a support team is on hand each day to carry out repairs and make sure the vehicles get back to base each day.
Goulburn business owners, Leigh Layden (CNR Insurance Brokers) and Josh Lambert (Tackle World Goulburn) are taking part in the rally to raise more than $3000 in aid of cancer research to remember family and friends who have been affected by cancer.
Their "Bongo Bus" is sponsored by CNR Insurance Brokers, Tackle World Goulburn, Studio 4 Signs and Designs, Goulburn and D and R Tyres, Crookwell.