Everyone's fave - Delta Lake! It truly is an insanely stunning lake and worth the hike.
Delta Lake is a challenging 8.1 mile hike in Grand Teton National Park, known for its stunning alpine waters and breathtaking views. The trail, which is only accessible between June and October due to heavy snowfall, involves steep switchbacks and boulder fields before reaching the milky blue waters of Delta Lake. The unmaintained trail used to be confusing to find, but it has recently gotten so popular from Instagram that it's quite busy. Be prepared with sturdy hiking boots, plenty of water, sunscreen, bear spray, and trekking poles if you use them for the rocky terrain. And remember, it's best to tackle this hike early in the day to avoid the scorching midday sun.
Start the hike at the Lupine Meadows trailhead and follow signs for Surprise/Amphitheater Lakes. It's pretty straightforward and you'll go up 6 switchbacks before you drop off an unmarked trailed to your right on the 6th one. This trail will lead you over boulders and up to the lake. Enjoy!