Cyclo-cross is a form of competitive cycling that takes place on a mixed terrain, often featuring grass, dirt, and obstacles. Races typically last 30 to 60 minutes and involve riders navigating a course that includes barriers, steep hills, and sharp turns. Cyclists often dismount and carry their bikes over obstacles, making it a physically demanding sport. The sport originated in Europe in the early 20th century and has grown in popularity worldwide. Cyclo-cross events are usually held in the fall and winter months, with riders using specialized bikes designed for durability and versatility on various surfaces.