Cape Horn Conservancy is a 501(c)(3) nonprofit organization.
The Cape Horn Trail as we know it has been around to some extent for about 15 years.  A recent history of the trail will be posted on this page shortly.  In the meantime you might enjoy the following excerpt from Across Rushing Waters (Mark E. Parsons, 2002) about the trails around Cape Horn in the 19th century:

Chapter 4 The Valley of the Rushing Waters
"It was up this trail from the landing at Cape Horn that the Indians found their best spear fishing from the Washougally Camp. A few miles inland was what we still call Salmon Falls and was then easier reached by boat around Cape Horn than overland or upriver from their camp.
It was to the West of these falls they built their temporary shelters to which they could come during the fish runs and to which today's fishermen eagerly await. These trails overland also went to cleared hunting grounds (Mabee Mines Road) and into the berry fields further up the slopes. These same trails also went over the high mountains and into Indian Heaven, located in the interior of Skamania County.

The Cape Horn trail passed just to the east of the high bluffs and into Canyon Creek. Splitting here, one went over the hills to Salmon Falls (Salmon Falls Road), and the left trail traveled down the creek to its confluence with the Washougal River (Canyon Creek Rd.)

Chapter 5 The First Settlers
"Skamania County, organized by the Territorial Legislature on March 9, 1854 and given the Indian name which many believe means "swift water" (referring to the waters that once passed through its southern border) became home to a different kind of pioneer from that which settled in the Willamette Valley further west. The Skamanians were a tougher lot, more independent, and maybe not as industrious. They were loners but knew the value of helping their neighbors. They were mountain folk who treasured their freedom and fought for their rights. They cared little for the comforts of the city and looked to the hills and fields for their livelihoods."

"Still others believe Skamania was originally Skamanakh. The earliest white man interpreted the word to mean "rest-a sheltered place of peace and comfort where wild game abounds in plenty and salmon leap in millions in the majestic river that flows past its high cliffs."

More area history:

An overview of the history and prehistory of the Columbia River Gorge National Scenic Area was written by Beckham, Minor, Toepel and Reese (1988).
A more specific review of the history and prehistory of the project area were presented by Richard McClure (2002).
In part he wrote:
“In the early 19 century, the Cape Horn area was within the traditional territory of two groups of indigenous Chinookan-speaking people: the Multnomah, with villages to the west, and the Cascades, with villages to the east (French and French 1998:361-363). According to Curtis (1907-1930,8:181), Cascades people living along the north bank of the Columbia River called themselves galaxixxack, based on the word for rapids or cascades. The Cascades village of waxixwas reportedly located somewhere in the vicinity of Cape Horn, but little is known about the settlement.
“During the 1850s and 1860s, many Cascades families moved to the Yakama Indian Reservation. A few remained in the local area, including KalliahTumalth, or “Indian Mary” who lived at Skamania, and her daughter, Amanda, who married farmer Charles Williams and settled at Cape Horn around 1900 (Williams 1980:140). Amana Williams was an enrolled member of the Confederated Tribes of the Yakima Indian Reservation.

“Although there are no specific historical accounts that describe native use of the Cape Horn Landing area, an illustration from the popular 1872 book Picturesque America, depicts what appears to be an Indian encampment there (Bryan 1872:42.) The engraving, by artist Robert Swain Gifford, shows a single pole-framed conical shelter, possibly a mat lodge, near the edge of the river, with a canoe offshore...”

“American settlement at Cape Horn began in 1846, when James Walker and his family established a homestead near the landing just upstream from the cliffs of Cape Horn. Walker had come west by ox team from Pennsylvania in 1844. Until 1855, when John and Sarah Stevenson settled at Cape Horn, the Walkers were the only settlers in the vicinity.

“By 1875, ten families were living in the Cape Horn vicinity, and by 1882 that number had grown to fifteen, warranting the establishment of a post office in June of the following year (Ramsey 1963:41, SCAS 1958-1959). According to one source (SCAS 1958- 1959), the post office was initially located in “the old dock building” at the river landing, and later moved to the home of Loren Wright, on his farm “at the top of the hill.” Mail was brought to the community by boat from Bridal Veil, across the river, several times a week. The community of Cape Horn was relatively dispersed, and consisted of individual family farms scattered over hundreds of acres north and northeast of the river landing. By the 1880s, the landing itself had become a small hub of business and commerce and a regular stop for several Columbia River steamboats (McClure 2002:7).

“For several decades, the Cape Horn community and residents of the nearby Prindle area relied on steamboats as their principal means of transportation to larger communities such as Portland and Vancouver....A schedule of service for 1912 indicates that the Dalles City made two stops a day at the Cape Horn wharf (Timmen 1973:214).

“Cape Horn landing, also known as Breslin Landing (Williams 1980), was an important distribution point for agricultural products from local farms. According to the 1900 census, the majority of adult men in the Cape Horn Precinct worked as farmers or day laborers. Articles from the Skamania County Pioneer in 1902 and 1903 indicate that potatoes, prunes, apples, and hay were among the items shipped to markets from Cape Horn. Cattle and sheep were also raised on local farms. Some of the men from the Cape Horn area worked for logging companies in the surrounding area. A small amount of commercial salmon fishing was done seasonally using horse drawn seine nets. A bar in the river near Cape Horn was ideal for seining.

“The year 1907 marked an important turning point in the history of the Cape Horn community. The population of the village swelled with the influx of about 150 men employed in the construction of the Seattle, Portland & Spokane Railroad. Photographs in the collection of the Columbia Gorge Interpretive Center show a tent camp on the hillside west of the landing, and for months the men labored in the construction of a tunnel through the cliffs of Cape Horn. By June the tunnel was largely complete, and in November of the same year, the first train came down the line through Cape Horn. With the establishment of a rail line along the north bank of the Columbia, the era of steamboat transportation began a decade-long decline. Small railroad stations were established at Cape Horn and nearby Prindle (McClure 2002: 8-11).

“In 1926, construction of the Evergreen Highway (State Route 14) was begun across Cape Horn. While blasting a ledge across the face of the cliffs in November 1927, the construction crew triggered a landslide that swept through Cape Horn landing. An eyewitness reported that, “Old man Stevenson’s house was pushed right out into the river...The slide took the houses and went across the railroad tracks. It took the docks and the landing and filled the dock channel...The slide pushed like a bull dozer, and it took the track and fill right into the river...” (Bethea 1980:9). Apparently, the force of the slide created a wave that swamped boats across the Columbia River (McClure 2002:11)”.

McClure, Richard 2002Cultural Resource Reconnaissance Survey and Historic Survey of the Hansen/Gillette Property, Cape Horn Landing, Skamania County, Washington. Skamania County Planning Number NSA-02-010.Manuscript on file with the US Forest Service in Hood River, Oregon.NADB # 1341150.