Interview with Ken Herkenhoff, a research geologist at the U. S. Geological Survey’s Astrogeology Science Center. Herkenhoff begins by sharing how he first became interested in Mars polar research while a student at Caltech. He recalls studying images from Mariner 9 with Larry Soderblom and explains his focus on layer deposits in polar ice. Herkenhoff reflects on the changes in technology which have influenced his work and discusses the different image qualities across Viking and Mariner missions over the years. He explains the process of creating maps and discusses the transition from hand-drawn maps to GIS maps. Herkenhoff recalls his move from the Jet Propulsion Lab to USGS and discusses his current work using images from the Curiosity rover. The interview concludes with Herkenhoff sharing the differences between mapping different regions, and he encourages young people to pursue planetary mapping.