Swimming almost a mile through open water, biking about 25 miles and then running more than six miles around Rio de Janeiro might inspire some athletes to take a break, particularly if the effort had earned them the first Olympic triathlon gold medal in United States history.

But Gwen Jorgensen, who did all that on Saturday, has other plans: She will run in the New York City Marathon on Nov. 6. That race is only 11 weeks away, and it will be 16.2 miles longer than the farthest Jorgensen has ever run.

“When you ask athletes what they want to do after they win gold or the Super Bowl, they say they want to go to the happiest place on earth,” Jorgensen said. “Running is my happiest place. It’s my Disneyland.”

Her first marathon will come after some unconventional preparation. Although Jorgensen, 30, is probably the top triathlete, male or female, to make her debut in the New York City Marathon, nothing in her training has approached the endurance test of the 26.2-mile race.