Actually, CO does offer
Stopover Rewards for "only" 35,000 valuable NonePass® miles.
Generally you can get more flexibility for fewer miles by using two standard travel rewards. Don't ask me why it should cost more miles to stay put somewhere then it takes to fly somewhere and back.
You don't suppose that you get free booze and better food on a First Class stopover for 60,000 miles, do you?
Code:
Stopover Rewards
Stopover Rewards allow you to take a scheduled break in travel on the route
between your point of origin and your destination city (e.g., a stopover in
Houston on a flight from Los Angeles to Newark).
Stopover Reward travel is valid within or between the 48 contiguous United
States, Alaska and Canada.
Point-of-origin and destination cities may not be used as en-route stopovers.
Generally, stopovers are allowed only along the most direct route of travel.