Black Mesa Oklahoma – Upper Left Adventure https://upperleftadventure.com Join us while we explore, travel, and adventure in the upper left corner of the 48 United States Mon, 06 Apr 2026 22:30:04 +0000 en-US hourly 1 https://wordpress.org/?v=6.9.4 https://upperleftadventure.com/wp-content/uploads/2023/06/cropped-CaverPilot1-764x1024-1-32x32.jpg Black Mesa Oklahoma – Upper Left Adventure https://upperleftadventure.com 32 32 219695246 Black Mesa, OK, US Highpoint #29, 27 May 2006. https://upperleftadventure.com/adventures/black-mesa-ok-us-highpoint-29-27-may-2006/ https://upperleftadventure.com/adventures/black-mesa-ok-us-highpoint-29-27-may-2006/#comments Mon, 06 Apr 2026 22:00:14 +0000 https://upperleftadventure.com/?p=3478 Read more]]> https://upperleftadventure.com/adventures/black-mesa-ok-us-highpoint-29-27-may-2006/feed/ 3 3478