It was an unexpected treat to visit Jackson Lake and the Grand Tetons on my recent trip to Yellowstone National Park. Mount Moran loomed, reflected in Jackson Lake, with a few misty clouds surrounding its base. It was a chilly October morning and we watched in amazement as two young women in swimming suits dashed across the rocky beach and with little hesitation, jumped into the water. I’m not sure what the temperature was but the average temperature for the day, according to the National Weather Service, was 23 degrees. We were not tempted to join them, preferring to absorb the sunshine and the spectacular view.