Humboldt’s Dave Orr is back from a recent winter trip, but it’s not your typical wintertime excursion. Orr, a teacher and coach at Humboldt High School, returned to Iowa after a whirlwind, nine-day trip to Chile and Antarctica, where he ran two marathons within 24 hours under some unique and yet challenging conditions. Orr, who returned to Humboldt on Mar. 2 after departing on Feb. 22, called it “an experience of a lifetime.” “This is something I’ve been wanting to do for about eight years now. I guess you could say it’s an experience of a lifetime,” Orr said. Orr was accompanied by a college friend who lives in Polk City. The pair were among 65 runners and five tour officials who made the trip. After departing Des Moines on Feb. 22, the flight down south included a stop in Dallas, then a direct flight to Santiago, Chile. From there, a flight to Punta Arenas, the southern tip of South America. “Antarctica is mostly a sheet of one-mile thick ice.