The Mountain Hotel (Quest) unlocks once the following conditions have been met:
- Complete The Rocky Mountains quest
"Begin building a mountain hotel. You can be sure you are creating the perfect mountain resort in Aspen."
- Buy the foundation of the Mountain Hotel
- Collect taxes five times
"You've begun work on a major mountain resort. Get materials to finish more quickly. They are in your Storehouse."
- Social Quantum's ID for this quest is 70580.