The preserve itself is a free nature park with trails for hiking, biking, and wandering. However, there is also the Lehigh Valley Zoo within its limits. It's fees are free parking, 6.50 adults, 6 seniors, and 5.50 children. They also offer a reasonably priced membership.
Free admissions :)
Parking is Free and I think it was $ 10.00 to get in make sure you get food for animals at front gate and stuff for giraffe you are going to want to really see it up close. Have fun by the way the kids are really going to like it.
Parking is free
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