A historical look at early railroad planning across a young nation. This volume presents extracts from a mid-19th century survey that sought the most practical and economical route for a railroad from the Mississippi River to the Pacific Ocean. It frames the big questions, cites prior explorations, and compiles map-based reasoning used by topographers and military engineers. The book focuses on the route near the 35th parallel, weighing terminal locations, terrain, water, timber, and agricultural lands. It blends field notes, profiles, and strategic considerations to explain why San Francisco became a favored Pacific terminus and how routes across New Mexico, the Cimarron region, and Texas-style plains were evaluated. It also includes discussions of existing and proposed lines from St. Louis to the Gulf and the interior, plus the challenges of bridging rivers and crossing canyons, rivers, and plateaus along the way. How 19th-century explorers analyzed geography, soils, timber, and water sources to judge feasibility. Which termini and connecting routes were considered and why some paths seemed more workable than others. Reference to maps, profiles, and prior surveys that informed route decisions. Context on the broader goal of linking eastern markets with Pacific ports. Ideal for readers interested in historical railroad planning, western exploration, and how early engineers approached vast landscape challenges.