Delta Lake

Delta Lake is a high alpine lake in Glacier Gulch beneath the Grand Teton and Teton Glacier. Its turquoise water and close mountain walls make it a memorable destination, but earning that view means a strenuous backcountry outing. Keep it for a day when steep climbing and route-finding suit you; the route to the lake is an unofficial path, not a straightforward extension of the maintained trail.

Start at Lupine Meadows Trailhead. The maintained path climbs toward Surprise and Amphitheater Lakes, then the popular Delta Lake route branches away. The final approach crosses steep, loose rock and boulders, with faint tracks that can be hard to follow. NPS describes it as unofficial, so don't treat it like a signed, maintained trail. Distance estimates vary with the route people take; check current ranger guidance and use a navigation plan that works offline.

The trailhead is reached from Teton Park Road by a one-mile dirt road. Its gravel lot has 106 spaces and a vault toilet, and NPS warns of long waits at peak times. An early start helps with parking, though it won't make the lake quiet by itself: visitors often report crowds along the route and at the shore. No food service or public drinking-water outlet is listed for the lake, so arrive with what you need for the whole outing.

The lake sits just above 9,000 feet, and the rough climb is still waiting on the way back down. Snow can linger on these high trails into mid-summer; NPS does not update Lupine Meadows route conditions in winter. Check the weather, snow and current access before you go, and don't assume a clear valley means an easy route above treeline.

From the lake, the Grand Teton and Teton Glacier rise over a steep rock bowl, with turquoise water at your feet. For a photo, look for a spot on the south shore where the water can lead toward the Grand; a view near the creek also frames the lake under the peaks. The hard approach is the trade-off: visitors often praise the view, though the loose footing and crowding can undercut the experience.

The Teton Range around Delta Lake was carved by Ice Age glaciers, which cut the deep U-shaped canyons beneath the peaks. The largest glaciers were gone by about 10,000 years ago; smaller glaciers formed in high cirques during the Little Ice Age, from 1400 to 1850. Teton Glacier is still visible above the lake, and NPS has tracked the park's glacier retreat since the late 1800s.