Recon Race A Marine completes the second portion of a swimming event during the Recon Challenge at Marine Corps Base Camp Pendleton, Calif., April 29, 2022. The 25-mile obstacle course has ten challenges and honors reconnaissance Marines who gave the ultimate sacrifice in combat. SHARE: Download: Full Size (1.29 MB) Tags: Marine Corps Credit: Marine Corps Lance Cpl. Hope Straley VIRIN: 220429-M-UP713-1093T.JPG Photo Gallery