You will queue for that long for 1 trip up (chairlift) and down (cart). Then you need to repeat queueing for the 2nd, 3rd or 4th trip up and down depends on the luge package you take... crazy haha. Easily 5 hours gone if choose 4 times ride (total 4.5 hours queueing + 30 minutes 'enjoying' chairlift & cart).