It’s day three of Operation Black Site, an elite course designed to teach executives, leaders, and entrepreneurs “badass skills” from Green Berets, Navy seals, and U.F.C. fighters.

We are at Black Site Ranch, a 26-acre tactical-training facility in Southern California’s wine country, an hour’s drive inland from Laguna Beach. It features more than 30 distinct components, including obstacle courses, a live-fire shooting range, and the shoot house—a close-quarters-combat training structure designed by Tim Kennedy, a U.F.C. fighter and U.S. Army sergeant. The atmosphere is punishing: wooden structures, dirt trails, and a schedule designed to push participants past their limits.