show Abstracthide AbstractIn this study, we used target enrichment methods to sequence ultraconserved element loci from 80 mountain treeshrews (Tupaia montana) sampled across their elevational range on two mountain peaks in Kinabalu National Park (KNP), Sabah, Borneo. Our study objectives were to use a population genomics approach to determine the population genetic structure and genetic diversity of mountain treeshrews in KNP, to test the hypothesis that the broad elevational gradient they inhabit has resulted in limited gene flow across the landscape. These data serve as a foundation from which to track the effects of global climate change in this species over time.