"Log rolling is a really unique, traditional sport that has a really rich history," she says. "It's a sport that came out of a way of life, out of the logging industry."
Since real logs are too heavy to lift into a pool, Delaney's team invented a plastic log that's filled with water.
Watch the video above to see this unique sport in action!
Click here to learn more about how Delaney is bringing log rolling to the Bay Area.
VIDEO: World champion log roller brings her sport to Vallejo
World champion log roller brings her sport to Vallejo