The sixth stage of the Dakar Rally from Oruro to La Paz was cancelled late Friday after heavy rainfall in western Bolivia.
The 786-kilometre-long stretch planned for Saturday was impassable, Marc Coma, the organizer of the off-road endurance race said in Oruro, according to the "El Deber" newspaper.
Rally participants are instead to drive 216 kilometres to La Paz over asphalt roads. After a rest day, they will tackle the seventh stage to the salt deserts of Uyuni on Monday.
Frenchman Sebastian Loeb won the fifth stage from Tupiza to Oruro on Friday in a Peugeot. Some parts of that stretch had to be rerouted too, due to overflowing rivers.
Loeb's countryman Stephane Peterhansel, also in a Peugeot, leads the race by 1 minute, 9 seconds.
The 39th edition of the rally is taking place in Paraguay, Argentina and Bolivia in 12 stages covering almost 9,000 kilometres and is scheduled to conclude in Buenos Aires on January 14.
It is the ninth time the race has been staged in South America.