In situ measurements of aeolian sands were made at and near High dune. (a) A portion of a color Mastcam mosaic (from mcam05350; sol 1171) near High dune, showing targets Warsaw, the crest of a large ripple, and Weissrand, a rover wheel track through the sand (inset context image is a Navcam mosaic from sol 1181). Portions of MAHLI focus merge images of targets (b) Warsaw (natural illumination; 1182MH0005380000402862R00) and (c) Weissrand (natural illumination; 1182MH0005380000402830R00). (d) A portion of RGB color Mastcam mosaic (from mcam05372; sol 1184) on the stoss edge of High dune, showing targets Kibnas, a small ripple within a larger ripple trough, and Barby, the crest of a ripple (inset context image is a Navcam from sol 1184). Portions of MAHLI focus merge images of (e) Kibnas (night with white LED illumination; 1184MH0001630000402965R00) and (f) Barby (natural illumination; 1184MH0001630000402969R00). MAHLI products used are the dark‐subtracted, flat‐fielded, DRXX level processed data at resolutions in Table 2.