Tenaya Lake is a lake in Yosemite National Park, located between Yosemite Valley and Tuolumne Meadows.

Tenaya Lake was created by the Tenaya branch of the Tuolumne Glacier as it passed through Tenaya Canyon. The lake is supplied by a network of creeks and springs including Murphy Creek to the northwest and Tenaya Creek. Tenaya Creek is an outflow of Cathedral Lakes and serves as both the principle inlet and outlet of Tenaya Lake. Tenaya Creek also runs through Tenaya Canyon into Yosemite Valley. The surface of Tenaya Lake has an elevation of 8,150 feet (2,484 m).

Tenaya Lake is named after Chief Tenaya, who met the Mariposa Brigade near the shores of the lake. Tenaya protested that the lake already had a name: Pie-we-ack, or "Lake of the Shining Rocks." This original name is now attached to a granite dome to the east of the lake.

According to the U.S. National Park Service, problems associated with visitor use have been persistent for decades. The Park Service has commissioned The Tenaya Lake Area Plan, a formal study and action plan to address solutions to these issues.

In 1992 a campground on the southwest shore of the lake was closed.