This file contains background, inferences and hypothesis testing results, and conclusions based on demographic modeling analyses conducted on ddRAD-seq SNP data from southwestern white pine (<i>Pinus strobiformis</i>) core and periphery (hybrid zone) lineages, plus limber pine (<i>P. flexilis</i>), presented in the format of a scientific poster. The first author (JCB) recently presented this poster to colleagues at the Evolution 2017 Meeting held from June 23-27 in Portland, OR. Results shown here form the demographic modeling portion of a broader integrative project studying ecological speciation and the influence of hybridization in maintaining species boundaries in the southwestern white pine–limber pine study system using i) species distribution modeling and niche divergence tests, ii) demographic modeling (statistical phylogeography), and iii) Bayesian genomic cline analysis.<br
