SELAM (Simulation of Epistasis, Local adaptation with Admixture and Mate choice) is a forward time population genetic simulation for studying admixture between ancestral subpopulations. This program tracks local ancestry along chromosomes. SELAM supports complex demography scenarios, including changes in population sizes, migration rates, and arbitrary numbers of subpopulations. This program can also accommodate sophisticated selective regimes, including dominance, epistasis, local adaptation, and mate choice.