Bats are a diverse order of animals; consequently species from this order fill various niches, and have different habitat needs based on morphology, microclimate preferences, roosting preferences and foraging needs. As the global climate continues to change, some bats may need to shift spatial use to adequately address their energetic needs. While some research suggests that bat species richness declines over an elevational gradient, exceptionally hot areas like the Sierra Nevada foothills in California may drive some bats to higher elevations for roosting or foraging to manage evaporative water loss or promote daily torpor. The aim of our study is to assess seasonal bat species composition and activity over an elevational gradient at Sequoia and Kings Canyon National Parks, California. Acoustic data were collected from seven sites spanning four elevation categories (foothills, montane, subalpine, and alpine) from April 2023 – August 2024. Data will be analyzed to determine if and how different bat species utilize the elevational gradient. Understanding species composition within this area can also provide insight into how white nose syndrome may affect bat populations in Sequoia and Kings Canyon National Parks, and inform future conservation efforts for species of concern.