CALIFORNIA HIKER May Lake. Photo by California hiker. May Lake May Lake is located in the High Sierras of Yosemite's Tuolumne Meadows. The hike starts at about 8000 or 9000 feet height. Road 120 goes through Tuolumne Meadows Its open late Spring to early Fall. Check road conditions before going. Photos and Graphics by California Hiker. Please do not take!