Muon Collider in the future of particle physics.

Collider physics remains a cornerstone of experimental particle physics, having enabled the establishment of the Standard Model through landmark discoveries ranging from the charm quark in 1974 to the Higgs boson in 2012. While the Large Hadron Collider will continue to define the Energy Frontier for years to come, probing physics beyond the Standard Model may require new collider technologies. Muon colliders offer a compelling path forward, combining compact size, high efficiency, and the potential to reach multi-TeV energies. Realizing such a facility, however, demands a coordinated global R&D effort over the coming decades. Recent recommendations from the P5 and the National Academy of Sciences strongly endorse this pursuit, positioning a U.S.-based muon collider as a key long-term objective. This talk will present the scientific motivation for a high-energy muon collider, outline the associated technical challenges, and discuss the roadmap toward its realization. In addition, complementary physics programs that could be enabled by the muon accelerator facility will also be briefly discussed.