El Paso began where the river, desert, and human ambition met. In this richly reported account, the author follows the long arc of the city's formation: Indigenous stewardship and survival; Spanish and Mexican routes and settlements; the imprint of railroads, industry, and military power; and the everyday labor and creativity that made streets, neighborhoods, and institutions. Rather than a single origin myth, the book reveals a layered origin story with an accumulation of decisions, devastations, and small acts of care that produced the city we now know. Through archival fragments, oral histories, and on-the-ground reporting, the narrative moves between eras and voices: elders who remember borderlands that no longer exist; migrants whose passage remade economies and families; entrepreneurs and activists who contested who could belong. The prose is both analytical and human, attentive to policy and map as well as to recipes, rituals, and neighborhood gossip. Beyond the Rio Grande reframes the origins of El Paso as an ongoing work in process where building a city that repeats and reinvents itself with each generation never stops.