New England’s Largest Halloween Celebration Rises Again with Terrifying Haunts, Chilling Shows, and Scream-Worthy Thrills Six Flags New England leaves no tombstone unturned in bringing back the region’s premier Halloween celebration, Fright Fest presented by SNICKERS®. This year’s event promises epic thrills and chilling scares. Fright Fest opens Saturday, Sept. 20, and runs weekends and select days through Sunday, Nov. 2. This year, families get an extra weekend at the park for “Last Scare” Weekend