Kammala wannan jumla: Yankin ya fara jawo hankalin 'yan gudun hijirar daga Mexico da ke kusa da suka gudu daga
Juyin juya halin Mexico na 1910. Yankin Castolon shine wurin da ke kan sansanin Sojojin Amurka, wanda ake kira Campo Santa Helena, don rukunin gidaje masu sintiri kan iyakar Mexico da Amurka. Koyaya, a lokacin da aka kammala sansanin a cikin 1920 iyakar ta kasance cikin nutsuwa kuma sojojin ba su taɓa amfani da gine-ginen sansanin ba. A cikin 1921 an kafa Kamfanin La Harmonia a cikin barikin, yana aiki da tashar kasuwanci da noman auduga. Kamfanin La Harmonia an kafa shi ne a 1918 ta Howard Perry, wanda ya mallaki Kamfanin Ma'adinai na Chisos a Terlingua, tare da haɗin gwiwar Wayne Cartledge. Cartledge da ɗansa Eugene sun zaɓi sunan kuma sun gudanar da kamfanin. Kamfanin La Harmonia ya wanzu har zuwa 1961, lokacin da aka sayar da shi ga National Park Service. Shagon ya kone a cikin gobara a watan Mayu 2019.