The Clear Lake Volcanic Field (CLVF) in northern California is a young (2 Ma-0.008 Ma) volcanic system that could be hazardous upon eruption. Magnetotellurics (MT) is a passive electromagnetic geophysical method that measures subsurface electrical resistivity by recording the Earth's electrical response to natural time varying magnetic fields. To further understand the magmatic system of the CLVF MT data were collected with the end goal of producing a 3D subsurface electrical resistivity model. MT data were collected in multiple field campaigns between 2021 and 2022 on both public and private lands. Included in this data release is an HDF5 file per MT station that includes time-series data for each run, all runs combined and downsampled to 1 sample per second, and the estimated transfer function. These are formatted as MTH5 files (Peacock et al., 2022, https://doi.org/10.1016/j.cageo.2022.105102). All transfer functions are included in a ZIP file in EDI format, and an image of each transfer function is included in a ZIP.