Yes, there is a checkroom located next to the site entrance (at the corner of Avenue des Sciences Humaines and Rue de l'Université).
It costs $5, but it's free for your bike helmet!
The checkroom accepts items that are not allowed on the site EXCEPT: weapons, alcohol, drugs and related accessories, animals, fireworks, and firecrackers.
Please note that bags are searched before being accepted at the coat check.
Opening time: 12:30 p.m.