The penalties for driving an ATV illegally in Ontario vary depending on the violation. Some common violations include: 1. Driving an ATV without a valid driver's license or permit: Fine of up to \\$1,000 and/or 6 months in jail. 2. Driving an ATV on a public road or trail without wearing a helmet: Fine of up to \\$200. 3. Driving an ATV on a public road or trail that is not designated for ATV use: Fine of up to \\$1,000. If you are caught driving an ATV illegally in Ontario, you could face a fine, jail time, or both. It is important to be aware of the laws and regulations before you operate an ATV in Ontario.