ðə fˈɜːst dˈɑːkjuːməntᵻd ˈɪmɪɡɹənt tɹɐvˈɜːs ʌv sˈɑːnoːɹə pˈæs ɐpˈɪɹz tə hɐvbɪn ɪnðə lˈeɪt sˈʌmɚɹ ʌv wˈʌn θˈaʊzənd ˈeɪthˈʌndɹɪd fˈɪfti tˈuː baɪ ɐ wˈæɡən tɹˈeɪn nˈoʊn æz ðə klˈɑːɹkskˈɪdmoːɹ kˈʌmpəni.
The first documented immigrant traverse of Sonora Pass appears to have been in the late summer of 1852 by a wagon train known as the Clark-Skidmore Company.