Sky School's Overnight Programs are immersive, multi-day science experiences held at the Mt. Lemmon SkyCenter for students in grades 4–12. Participants investigate topics such as ecology, geology, astronomy, and climate science through hands-on fieldwork and nighttime telescope observation. Guided by University of Arizona graduate instructors, students explore the natural environment on Mt. Lemmon and work in small groups to complete inquiry projects using authentic scientific tools and methods. Evenings are spent learning about astronomy through guided activities, engagement with local astronomers, and observing the night skies through one of the world's largest public observing telescopes. The residential setting fosters deep engagement with the natural environment, the local astronomy community, and the scientific process. There are multiple program options depending on the desired length of stay and depth of content.