We have heard from the hotel that the room block will end on March 7th. We are working on setting up an alternate room block. Here is what we received from them:

Due to high occupancy at the hotel, the hotel has less room availability on 4/24 and 4/25. 4/26 still has plenty of rooms left to reserve. I can extend your cutoff date to March 7th. After March 7th, Thursday and Friday will no longer be able to be booked but Saturday and Sunday can. If guests that did not book before March 7th still need a room for Thursday or Friday, I recommend booking at the Intercontinental in St. Paul as we are connected to them by skyway.