The Teton Mountains are a mountain range located in the U.S. state of Wyoming. The range is a subrange of the Rocky Mountains and extends for approximately 40 miles, from the Idaho border in the west to the Yellowstone National Park boundary in the east. The highest peak in the range is Grand Teton, which stands at 13, 775 feet. The range is home to several ski resorts, including Jackson Hole Mountain Resort and Grand Targhee Resort. The Teton Range is also a popular destination for hikers, climbers, and other outdoor enthusiasts.