Fright Fest will start in early August this year… well, maybe not all of Fright Fest but it seems like the park is readying at least one trail to open within the next few weeks, possibly as some sort of preview?
Awhile ago I heard Great Adventure was very jealous of other Six Flags parks that run trails at other times during the year so maybe this is them trying to play catch up and extend the Fright Fest season, or part of it, just a little bit