This data set characterizes snow microstructure for 11 snow pits from the SnowEx 2023 NASA field campaign Intensive Observation Period (March 2023) using microcomputed tomography (micro-CT). Included with this data set are two- and three-dimensional microstructural analysis of snow samples, black and white binary images of each sub-sample scan, and raw instrument data. Containers of snow were collected at 6 snow pits in approximately 17 cm intervals. There were approximately 5-8 discrete containers per pit and each container had an ~1-2 cm overlap with the sample below. A 6-cm section of snow was dissected from each container of snow, which were analyzed in ~2 cm sub-sections. Each sub-section was scanned in three intervals using a micro-CT instrument. The three interval scans comprise multiple slices and were combined into the reconstructed final scan used for calculating the snow microstructural data.