Abstract: The stunning discoveries of the IceCube Neutrino Observatory have had a transformational effect on high-energy astrophysics. In this talk, I discuss the Trinity Demonstrator, the first step toward a Trinity Neutrino Observatory, which follows in the footsteps of IceCube by offering the prospect of detecting neutrinos at even higher energies (>petaelectronvolts). The goal is to unlock some of Nature’s best-kept secrets and explore fundamentally new physics.