This street was named for Carson Dobbins Boren (1824–1912), a member of the Denny Party that landed at Alki Point in November 1851. His sisters Mary Ann (1822–1910) and Louisa (1827–1916) married brothers Arthur (1822–1899) and David Denny (1832–1903) in 1843 and 1853, respectively. These weren’t the only Boren–Denny connections, either: his mother, Sarah Latimer Boren (1805–1888), who had been widowed in 1827, married John Denny (1793–1875) — Arthur and David’s father — in 1848. (Their mother, also named Sarah, had died in 1841.)
Boren is said to have built the first cabin in Seattle, at what is now 2nd Avenue and Cherry Street, in April 1852. He was elected King County’s first sheriff the same year. Boren’s land claim of 320 acres covered what is today a rectangle approximately bounded by (going clockwise) Yesler Way, 15th Avenue, E Cherry Street and its projection west, and Western Avenue and its projection north, but he sold it for $500 to Charles Terry and Edward Lander in 1855.*
* “Its projection” is necessary here because of Boren and Arthur Denny’s decision to have their street grid follow the shoreline, while “Doc” Maynard preferred his to follow the cardinal directions; Maynard’s grid eventually extended through the entire city and, indeed, county. (See “Seattle’s first streets.”) The actual southern boundary is a bit north of Yesler Way since both Boren and Maynard adjusted their initial claims to give Henry Yesler land to build and supply his sawmill.
Why Boren sold his land isn’t entirely clear. Sophie Frye Bass writes in Pig-Tail Days in Old Seattle that he sold it “early at a great sacrifice and became a roamer and, therefore, did not share in the up-building of the town”; her sister, Roberta Frye Watt, is indirectly quoted by Junius Rochester thus: “Carson had an unhappy home life. This compelled him to move deeper and deeper into the forest; to hunt and dream; and to shed most of his possessions.” Indeed, he and his wife, Mary Ann, divorced in 1861.
Today, Boren Avenue S begins at 14th Avenue S, Rainier Avenue S, and S Jackson Street, and goes 2⅕ miles north to Valley Street and Lake Union Park, becoming Boren Avenue as it crosses Yesler Way and Boren Avenue N as it crosses Denny Way. It is one of the few north–south streets in Seattle to have three directional designations.