I've posted this on MonsterSpace and Theme Park Adventure, and I thought I might as well post it here too.
TPA: [UPDATE #2] Sleepy Hollow Mountain: The Ultimate RCT3 Recreation in Knott's Halloween Haunt Forum
#1 - YouTube - [UPDATE #1] Knott's Scary Farm - Sleepy Hollow Mountain in RCT3
#2 - YouTube - [UPDATE #2] Knott's Scary Farm - Sleepy Hollow Mountain in RCT3
Here's some pictures of the ride and scenery I've made so far: