Sediment biogeochemistry plays a critical role in nutrient cycling, carbon storage, and water quality in freshwater ecosystems, yet long-term, large-scale datasets have historically been scarce. The National Ecological Observatory Network (NEON) provides a unique opportunity to address this gap through its standardized, continental-scale monitoring program. NEON’s Sediment chemical and physical properties data product (DP1.20194.001) includes measurements of organic matter, nutrients, and trace elements collected twice annually (spring and fall) from NEON’s 34 aquatic sites (24 wadeable streams, 3 non-wadeable rivers, 7 lakes) that span 19 ecoclimatic domains across the United States. This presentation will introduce the NEON sediment dataset and explore approaches for detecting spatiotemporal trends after the first decade of data collection. We will highlight methods for visualizing and analyzing trends in sediment chemistry under conditions of low temporal frequency but high spatial coverage and explore how these data can reveal signals of environmental change, land-use impacts, disturbance events, and ecosystem processes across spatial and temporal scales. By leveraging NEON’s open-access, continental-scale monitoring network, researchers can address fundamental questions about sediment dynamics and their role in freshwater ecosystem function. This work demonstrates how continental-scale monitoring can inform freshwater science and management and provides a foundation for collaborative research using NEON’s growing time series.