To dip more than a toe in the spring snow melt that fills the river, lakes and streams in Grand Teton National Park takes fortitude. Though the air temperature in dry northwest Wyoming can reach into the 80s during July and August, the short season means the water temperature never has a chance to catch up.
Lakes
A designated swimming beach at Colter Bay on the east side of Jackson Lake provides protection from boats, which must stay outside the marked boundaries. The shoreline water in Grand Teton National Park’s largest lake might reach 60 degrees. You’ll find restrooms and a picnic area here, with views of massive Mount Moran. Shallow String Lake looks more like a river connecting busy Jenny and Leigh lakes, and the water is considerably warmer than in most other lakes in the park. For a more secluded swim, head to one of the park’s more remote lakes, like Two Ocean or Emma Matilda on the east side of the park’s main road.
Pool
The heated outdoor swimming pool at Jackson Lake Lodge means even wimps can enjoy swimming in Grand Teton National Park. Guest of either Jackson Lake or Jenny Lake lodges can use the pool for free, but anyone can pay a fee to swim. The $6 in 2010 includes the watchful eye of the park’s only lifeguard, making this a good option for families with small children. There’s even a toddler pool.
Hot Springs
If you prefer your water hot no matter the time of year, head for the natural hot springs in the John D. Rockefeller, Jr. Memorial Parkway area just outside the park’s northern boundary. From the trailhead near the Flagg Information Station, it’s less than a mile hike on the Polecat Creek Loop Trail to Huckleberry and Polecat hot springs. Park in front of the Flagg Ranch Lodge, because space at the trailhead is reserved for commercial vehicles. The spring runoff usually cools the water to a refreshing 80 or 90 degrees.
Other Water Sports
If cold water gives you pause, you can enjoy the liquid aspect of Grand Teton National Park without fully submersing yourself. A kayak or canoe puts you literally at water level, but you can stay mostly dry as you circle the shoreline of a smaller lake or dodge motorboats on Jackson and Jenny lakes. Several commercial companies operate scenic raft trips on the Snake River, which remains relatively calm until after it flows out of the park. And there’s always the option of pulling on a wetsuit and joining the waterskiers or windsurfers on Jackson Lake.
Warning
Park officials strongly advise against swimming in the Snake River, where strong currents and unstable banks can make getting out difficult.



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