Oakhurst hunter-gatherers show unbroken genetic continuity from 10,000 to 1,300 cal bp. Modern ‡Khomani San and Karretjiemense share direct IBD segments with 1,300-year-old Oakhurst individual. Southern San cluster genetically closest to ancient Oakhurst despite recent non-San admixture. Northern and southern San split before 20,000 bp with higher FST to Oakhurst in northern groups. No East or West African ancestry in Oakhurst until after 1,300 cal bp. Pastoralist East African admixture into San/Khoe dated to 1,068 bp. Bantu West African admixture into San/Khoe dated to 578 bp, earlier in Bantu at 808 bp. Female-biased gene flow from San into pastoralists and farmers with 2-5 San women per San man. Iron Age KwaZulu-Natal farmers show male-biased San admixture unlike modern patterns. Southern San heterozygosity higher than modern San, rejecting isolation. San basal to all other human lineages in TreeMix. Latitude correlates with FST to Oakhurst, closer groups more related. Contemporary San average 9%+ non-San admixture obscuring ancient continuity. Some southern San preserve unadmixed Pleistocene San signature today. European admixture into southern San/Khoe dated to 199 bp, male-biased. Pastoralism and farming transformed most southern Africa gene pools after 1,300 bp. Oakhurst San genetically indistinguishable across 9,000 years via qpWave.