Portland's access to the Pacific Ocean via the Willamette and Columbia rivers, as well as its easy access to the agricultural Tualatin Valley via the "Great Plank Road" (the route of current-day U.S. Route 26), provided the pioneer city with an advantage over other nearby ports, and it grew very quickly. Portland remained the major port in the Pacific Northwest for much of the 19th century, until the 1890s, when Seattle's deepwater harbor was connected to the rest of the mainland by rail, affording an inland route without the treacherous navigation of the Columbia River. The city had its own Japantown, for one, and the lumber industry also became a prominent economic presence, due to the area's large population of Douglas fir, western hemlock, red cedar, and big leaf maple trees.