This data release includes 2016-2019 soil moisture timeseries for two drainage basins (“Arroyo Seco” and “Dunsmore Canyon”) that burned during the 2009 Station Fire in Los Angeles County, California, USA. The Arroyo Seco (0.01 km2) and Dunsmore Canyon (0.5 km2) drainages include two soil pits, one located near the drainage divide and another near the basin outlet. Following the naming convention established by Smith et al. (2019), we refer to the soil pits near the Arroyo Seco drainage divide and basin outlet as “AS1” and “AS3,” respectively. Similarly, we refer to the soil pits near the Dunsmore Canyon drainage divide and basin outlet as “DC1” and “DC3,” respectively. The coordinates of AS1 and AS3 are, respectively, 34.236972°, -118.195756° and 34.236053°, -118.194915° (WGS84). The coordinates of DC1 and DC3 are, respectively, 34.265075°, -118.237336° and 34.257528°, -118.241728° (WGS84). Each array (for which the total soil profile is ~50 cm) includes three soil moisture sensors positioned at 10, 25, and 50 cm depths. We report all available soil moisture information in terms of volumetric water content (VWC) for the time period and flag lapses in coverage. The VWC data for AS1 and DC1 overlap with Smith et al. (2019) for January 2016 through November 2017. We provide those data here to maintain consistency with Thomas et al. (2021). Sensor information, including the make/model, measurement units, and measurement frequency are contained in the “README.txt” file. Additional study details are provided in the following publications: Thomas, M.A., Rengers, F.K., Kean, J.W., McGuire, L.A., Staley, D.M., Barnhart, K.R., and Ebel, B.A. 2021. Postwildfire soil-hydraulic recovery and the persistence of debris flow hazards. Journal of Geophysical Research: Earth Surface. https://doi.org/10.1029/2021JF006091 Smith, J.B., Kean, J.W., Mirus, B.B., Staley, D.M, Rengers, F.K., and McGuire, L.A. 2019. Hillslope hydrologic monitoring data following the 2009 Station Fire, Los Angeles County, California, November 2015 to June 2017: U.S. Geological Survey data release. https://doi.org/10.5066/P98G0FS2. Smith, J.B., and J.W. Kean. 2018. Long-term soil-water tension measurements in semiarid environments: a method for automated tensiometer refilling. Vadose Zone Journal. https://doi.org/10.2136/vzj2018.04.0070.