The marathon is divided into three sections, with eight fixed obstacles such as bridges and water hazards which have to be crossed in the last section. The individual sections have to be mastered in a prescribed time, with each individual obstacle being timed separately. The fastest time in the obstacles achieves the best score. The gates of the single obstacles are marked with white and red letters A-F, which are to be passed in the correct order. The white letter should always be on the left side of the gate. Every driver will find a route that seems best for his team. Alternatives and variants are usually plentiful. The shortest route is of course often the most difficult, but not necessarily the fastest. The co-driver (groom) stabilizes the carriage by shifting his weight in curves and turns. Furthermore he can often help the driver to control the lines through consultation.