So the U.S. Open is set through 2024 (with Torrey Pines in 2021, TCC in 2022, LACC in 2023, and Pinehurst in 2024).
I'll be curious where they go in 2025. It will have been 8 years since a non-East or West coast Open (Erin Hills in 2017). I'll guess that the USGA goes to a place like Southern Hills, Oakland Hills, Olympia Fields, etc) in 2025. Just a guess.