The ASCO 2025 Exhibitor Room Block Management site will open on Monday, February 3, 2025 at 8:00 AM (EDT).

Access to this website will remain open until 5:00 PM (EDT) on Friday, April 4, 2025. All rooms must be paid for and reserved by this date or they will be released.

The Room Block Management site temporarily closes on Friday, April 4, 2025 at 5:00 PM (EDT) and will reopen on Friday, April 11, 2025 at 8:30 AM (EDT) for additional changes.  Shortened stays or cancellations are not refunded.

The Room Block Management Site permanently closes on Monday, May 5, 2025 at 5:00 PM (EDT).

Changes cannot be made between Tuesday, May 5 and Tuesday, May 13, 2025 due to transition of hotel reservations to the hotels. Beginning Wednesday, May 14, 2025, please contact the hotel directly.