Yes, a 17-year-old can technically go to Knott's Berry Farm alone, but they are subject to the park's Chaperone Policy, which is strictly enforced in 2026. Under the standard policy, any guest aged 15 or younger must be accompanied by a chaperone who is at least 21 years old. Since a 17-year-old is older than 15, they do not require a chaperone for general admission during the day. However, they must carry a valid government-issued photo ID (like a driver's license or passport) to prove their age to security at the gate. If they cannot verify their age, they may be denied entry without a chaperone. For special events like Knott's Scary Farm, the rules sometimes shift to require chaperones for everyone under 18; in 2026, it is vital to check the specific "Event Policy" on the Knott's app, as the park reserves the right to implement a mandatory chaperone requirement for all minors during high-security evening events or holiday periods.