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Surprise Lake is a lake in Grand Teton National Park, in the U. S. state of Wyoming. Surprise Lake is on east of 
Amphitheater Lake
Amphitheater Lake is located in Grand Teton National Park, in the U. S. state of Wyoming. Amphitheater Lake is only west of Surprise Lake and can be accessed via a strenuous climb of just under round trip from the Lupine Meadows trailhead. ...
and can be accessed via a strenuous climb of just under round trip from the Lupine Meadows trailhead. The National Park Service has three backcountry campsites at Surprise Lake which are allocated by permit only.
References
Lakes of Grand Teton National Park {{wyoming-geo-stub