The general area at the track where participants park their cars, set up canopies, and work on their vehicles between sessions. Think of it as your home base for the day.
The Race Experience Rules define it simply: "The area where a car parks when not participating in its sessions is the Paddock. Event Information may delineate the Paddock location and assignment of equitable amounts of space to each competitor." Speed limits are enforced — the CMP event rules specify "the speed limit in all non-competition areas including grid, paddock, and access roads is 10 mph. Any driver or guest found to be in violation may be ejected." The HPDE First Timers Guide notes that "even if you forget something, people are always willing to help. More than likely someone will be happy to show you how to torque your wheels or to help you check your tire pressures" — the paddock community is one of the most welcoming aspects of HPDE.