Longest horror film?

[LokiZee]

I went looking for this info when I watched Salem's Lot and was led to IT... But besides those (Which were actually TV miniseries!), what is the longest horror movie?? In my experience you can really rarely find one even 2 hours long (Saw III director's cut immediately comes to mind... but that's not really horror IMO). Anything stand out for you guys?

Stephen King's "The Stand" runs for 8 hours. Sure, it's a mini-series, but it's one complete story. Grindhouse, though properly 2 films, is 3 hours and 5 minutes. The Green Mile is one complete movie, not a mini-series, and runs for 3 hours and 7 minutes. MOH: Dance of the Dead ran for one hour and felt like infinity.