1. Bikes must be less than 35 pounds.
2. Designated tire size must be less than 2.5.
3. Front shock must have less than 6 inches of travel.
4. Bikes must have three chain rings unless they are single speed.
Just to close out this thread, I had no problem taking the mountain tandem on the lift. The restrictions are basically there to restrict "downhill" bikes. The ski lift is now closed to bikes, as they are now making snow.