The origin of Ultra-High Energy Cosmic Rays (UHECR) is a long-standing mystery. These extraordinary particles, with energies up to ten-millions times higher than those achieved in particle accelerators, are so rare that their detection required the construction of the Pierre Auger Observatory, covering 3000 square kilometers in Argentina. The world’s largest cosmic ray detector has recently completed an upgrade, which will be exploited in this award by the University of Chicago group. Making progress on the puzzles of UHECR may radically change our understanding of the most extreme astrophysical objects in the Universe, of the magnetic fields which permeate it, or of particle physics. Immersive research experiences and engagement of the local community and partnerships will bring UHECR science to both formal and informal audiences. These activities include engaging high school students in a stimulating research environment, reaching out and communicating science to older adults, and partnering with Planetariums. Data from the Auger Observatory are publicly available to a broad community – comprising both professional and citizen scientists – encouraging exploration for educational and outreach purposes, fostering scientific literacy and collaboration. The large statistics collected to date by the Pierre Auger Observatory, along with new data from its upgrade, provides unique scientific opportunities and the world-leading precision measurements of the ultra-high energy (UHE