Grand Teton National Park is more accessible than Yellowstone, and even a little warmer, but winter shuts down many of the park’s roads. Temperatures hovered around 10 to 20 degrees Fahrenheit under a brilliant blue sky during our three-day stay, maybe breaking into the low 20s on one afternoon. That is perfect ski weather, but we weren’t there to ski. We were there to take in the Grand Tetons and see wildlife.