Continuity mistake: When Clay and Jenna leave the lodge and walk over to his motorbike Clay has his bag on his left shoulder. In the next shot it is instantly in his right hand. Then when he sits on the bike the bag is still in his hand, but in the very next shot it's suddenly back on his shoulder.
Continuity mistake: Near the end when Jason is fighting with Clay in the barn, Clay's face is relatively dirty and sweaty. But in the shots when Jason is trying to force Clay's face into the rotating blades, his face is very clean and dry. Then in following shots it is dirty and bloodied up again. The cleanliness of his face does differ through the whole scene.
Trivia: It took the producers roughly a year to secure all rights so that they could have full use of everything Friday the 13th related (locations, characters, title). This is due to the fact that there were at least three parties who had different secured rights to certain areas of the franchise; with Paramount having rights to the original films they produced and New Line who has bought aspects of the series to create their three films. Eventually all issues were resolved and all parties came together to co-produce the movie.
Trivia: To fit the "Friday the 13th" theme, there are going to be thirteen kills in the movie. Producer Brad Fuller quoted "To me it seemed like a big number because we were shooting for forty days and that's basically a kill every two and a half days. It was surprising how much work it was to kill thirteen people!"