When does your resort plan on opening for the winter? March 22, 2024 00:39 Updated Boston Mills/Brandywine is slated to open Dec. 16 for the season. Opening day will be weather dependent. Related articles Where can I park? How much does it cost? Do you offer an early bird "First-Tracks" Program How do I reserve a RV spot for summer? When can I use my lift ticket? I bought my pass/ticket, now what?