My son is currently 46" tall. I assume at some point the summer he will surpass 48". My question is how do I handle a season pass? I'm planning on buying him a Junior pass, but do I have to upgrade when he reaches 48". Do they measure Junior pass members at park entrance?

When you purchase your passes, they will have him stand against a wall that has the height marked off. If he is under 48 inches, they will be charged as a junior. This applys when buying regular admission tickets also. Any questions please call the park for details. Also check at www.visitkingsisland.com for any details on this.

Since he's 46", you can still purchase the junior pass for him. The height (and age) is dependent on the time of purchase, and you will not have to upgrade to the adult pass during the season.