This dataset contains geographic locations, including the horizontal and vertical position, of the perimeter of the Ciste Mhearad snow patch on Cairngorm for three dates in the summer of 2023. Points on the perimeter were located using two Global Navigation Satellite System (GNSS) receivers as base and roving stations during visits on 19 June, 27 July and 28 July 2023. Full details about this dataset can be found at https://doi.org/10.5285/81d05a77-4c95-4f17-bdbf-4c0a0095db6d
