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I did not know Tuolumne was so high..I thought most of Yosemite was around 4000.
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The Yosemite valley is at 4000' There are a few places in the park that are a little bit lower. Most of it is higher, MUCH higher in many cases. Consider that the cliff faces lining Yosemite Valley are upwards of 3200'. Mt Lyell is the highest point at 13,120 ft but that's a 13 mile or so hike in. Mt Dana is just off the road and at 13,061 ft is much more accessible and would be recommended as a practice hike.
Wiki page for Yosemite Wiki page for Mt Dana A good board to check out for more Yosemite Information is
YosemiteNews.Info 
