Very few lakes are easily accessible in Yosemite National Park. Tenaya Lake (above) is one of the easiest to get to (when the Tioga Road is open, late May or early June to sometime in November) and is quite popular for picnicking, swimming, and canoeing. You can see Tenaya Lake from Olmsted Point and as you drive past it. Two picnic areas are available (one of them is wheelchair accessible).