Cathedral Lakes
What to Expect
Safety Advisory
The trail sits between 8,500 and 9,500 feet — visitors coming straight from sea level should expect to feel the altitude. Headaches and shortness of breath are common if you haven't acclimatized for at least a day. Slow your pace and hydrate aggressively.
Afternoon thunderstorms roll in fast from July through September, and the exposed granite around both lakes is the last place you want to be when lightning starts. Check the sky constantly after noon and be prepared to retreat into the tree line.
Trail Details
Pro Tips
Start before 8 AM to snag parking at the Cathedral Lakes Trailhead on Tioga Road — by mid-morning on summer weekends, cars line the road for a quarter mile in both directions, and rangers will turn you away.
Hit Lower Cathedral Lake first via the spur trail on the way up, not on the way back when your legs are toast. The short but steep descent to the lower lake is far more pleasant with fresh knees, and the morning light on the water is worth the detour.
The granite slabs along Upper Cathedral Lake's eastern shore make the best lunch spot in the Tuolumne high country — flat, sun-warmed, and positioned perfectly for photographing Cathedral Peak's reflection without other hikers in the frame.