Like the others say, it's $10. My teenage son and I did the zip line. The instructions take longer than the ride, really.

A ticket for the Flying Squirrel Zip Line is $10 for non-members and $5 for members. Parents must sign a waiver for any under-age children. One waiver per child. The line is 310 ft long and the weight limit is 275 lbs. The waiver form can be found at the official Bays Mountain web site or you can get one when you purchase the park entrance ticket upon arrival.

$10 Extra I believe if you purchase year pass for $35.

Zip line is 10 dollars 5 dollars for members