The Barlow Road (at inception, Mount Hood Road) is a historic road in what is now the U.S. state of Oregon. It was built in 1846 by Sam Barlow and Philip Foster, with authorization of the Provisional Legislature of Oregon, and served as the last overland segment of the Oregon Trail. Its construction allowed covered wagons to cross the Cascade Range and reach the Willamette Valley, which had previously been nearly impossible. Even so, it was by far the most harrowing of the nearly Oregon Trail. Before the opening of the Barlow Road, pioneers traveling by land from the east followed the Oregon Trail to Wascopam Mission (now The Dalles) and floated down the Columbia River to Fort Vancouver, then a perilous and expensive journey. It was also possible to drive livestock over Lolo Pass on the north side of Mount Hood, but that trail was too rugged for vehicles and unsuitable for wagons. A trading post (allowed by the Department of War) had been built where river crossings could be made along with the disassembly of wagons to make rafts suitable for floating down the remainder of the Columbia. The Barlow Road begins at Wascopam Mission and heads south to Tygh Valley (some consider Tygh Valley the origin), then turns west and roughly parallels the White River on the north and then west, crosses the south shoulder of Mount Hood at Barlow Pass, follows Camp Creek and the Sandy River for some way, and finally leads to Oregon City. The road was rendered largely irrelevant in the early 1900s by the construction of the Mount Hood Highway. It still exists as a dirt road in some places, while many other parts have been paved over by newer streets and highways. Planning and construction When Sam Barlow arrived at The Dalles late September 1845, as many as sixty families were waiting for river transport. The expected wait was more than ten days, and the transportation "exorbitantly" priced. Local inquiries turned up little information about traveling over the mountains except that water, timber, and grazing were plentiful. Barlow and H. M. Knighton set out to determine the feasibility of a route, seeking a more expedient and less expensive way to the Willamette Valley. Knighton decided it was impractical after 20 or 25 miles (30–40 km) and returned. Barlow forged on with a train of seven wagons, intending to return for river