You can go online to crosscheck you tickets access. Some tickets are limited to regular park access.
If its an a yr pass then it will get u in hurricane harbor
The passes for Six Flags and Hurricane Harbor appear different. It should say either Six Flags or Hurricane Harbor on it. Normally when you buy a season pass, you should have an online six flags account. You can always check it to see what benefits your pass gives you.
If Hurricane harbor is a regular ride, then why not. Check thier site, it is pretty detailed.
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