The contest involves two lumberjacks, each on one end of a log floating in the river. One or the other starts "walking" (or "rolling") the log, and the other is forced to keep up. The contest involves attempting to stay on the log while attempting to cause the competitor to lose their balance and splash into the water.
There are four different sizes of logs currently used in competitions, though there are many other custom sizes used in training. Each log size has a number and color associated with it. In the United States the dimensions of the logs are standardized by the United States Log Rolling Association (USLRA) while CAN-LOG standardizes the sizes in Canada.
A roleo is a logrolling competition where two people stand on a floating log and attempt to dislodge each other while spinning it. Victory is achieved by being the last one standing. These events have been televised on ESPN, as part of the Great Outdoor Games, and on the Outdoor Life Network.