What's the noun for criteriums? Here's the word you're looking for.
criterium
(cycling) A mass-start road-cycle race consisting of several laps around a closed circuit, the length of each lap or circuit ranging from about 1 km to 2 km (1/2 mile to just over 1 mile).
“On a sporting level, you have to note the consistent performances of Shannon in the toughest criteriums on the circuit.”
“Fleche was the fastest race I have done this season, and amazingly faster then most of the criteriums I did while racing in America with an average speed of 47 kph!”
“I'm all for the four and five hour hard races here, and the criteriums.”