Criterium racing is a type of bicycle race held on a closed circuit, typically featuring multiple laps around a short course. These races often take place on city streets or closed-off areas, making them accessible for spectators. The courses usually range from 0.5 to 2 miles in length and can include various turns and elevation changes, adding to the challenge for cyclists. Racers compete in categories based on age and skill level, and the races can last from 30 minutes to several hours. Criterium racing emphasizes speed, strategy, and bike handling skills, making it a popular format in the cycling community.