16 I believe
The minimum age for a passenger is 4 years old AND they must meet size and fit requirements. There is no minimum age to drive quads, although size and fit requirements apply (average 8 year old can ride mini quads). Minimum age to drive side by side is 21 years old with a valid drivers license. See FAQ page: http://www.torexatvrentals.com
For the kids to ride along I believe 3. We took our son who was 4 at the time and he did great. Loved it and it was very safe the entire time
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