Rising above a scene rich with extraordinary wildlife, pristine lakes, and alpine terrain, the Teton Range stands as a monument to the people who fought to protect it. These are mountains of the imagination. Mountains that led to the creation of Grand Teton National Park, where visitors can explore over two hundred miles of trails, float the Snake River, and enjoy the serenity of this remarkable place. Jackson Hole has long, cold winters, and snow and frost are possible any month. Mid-April, May, and June bring mild days and cool nights alternating with rain and snow. July and August bring warm days and cool nights, with afternoon thundershowers common. September, October, and November bring sunny days and cold nights alternating with rain and occasional snowstorms. From December to mid-April, days between storms are sunny and nights are frigid, and snow blankets the mountains and valley.