Cathedral Lakes is one of the best moderate hikes in the Tuolumne area. The National Park Service lists the trip at about 7.6 miles round trip with roughly 1,000 feet of elevation gain, usually taking six to seven hours. The trailhead is on Tioga Road near Tuolumne Meadows, and the path climbs through lodgepole pine forest, crossing the John Muir Trail on the way before reaching Lower Cathedral Lake, a clear alpine pool backed by the spire of Cathedral Peak. A short additional stretch leads to Upper Cathedral Lake, which many hikers prefer for its more open setting and views. Although the elevation gain is modest, the altitude is high, with the lakes lying well above 9,000 feet, so the walk feels harder than the numbers suggest. The hike is also seasonal, because the trail is usually snow-free only from early or mid summer until autumn, and snowmelt streams or lingering drifts can make route-finding tricky in early June. Mosquitoes are common in early summer, and thunderstorms often build in the afternoon, so a morning start is wise. Because the lakes are within the national park, swimming is allowed in some areas but water is cold even in August, and shoreline vegetation should be protected by staying on durable surfaces.
Why it is worth doing. Few hikes show off the Sierra's granite character as well as this one. Cathedral Peak rises like a stone spire from the forest, the lakes reflect its silhouette on still mornings and the meadows around Lower Cathedral Lake bloom in July. It is also a good measure of your fitness at altitude, with a gentle enough gradient that most reasonably active hikers can complete it with patience.
How to do it well. Carry plenty of water, snacks and a rain layer, and start early to be back below the peaks before afternoon storms. If you are coming from sea level, spend a night or two in the park first to acclimatize. Bring insect repellent for early summer, and a hat and sunscreen for the exposed sections. Pack out everything you carry in, and keep food stored safely because bears and marmots are both opportunists in this area.
Who it suits. Active hikers, photographers and couples who want a day in the high country without a permit. It is a long outing for small children but manageable for sturdy older kids. Pair it with a picnic in Tuolumne Meadows, a visit to Lembert Dome the next day and a drive across Tioga Pass to Mono Lake.
What to expect
The experience
A 7.6 mile round trip with about 1,000 feet of gain from Tioga Road near Tuolumne Meadows to Lower Cathedral Lake, with an optional extension to Upper Cathedral Lake.
Best time
July through September once the snow melts, starting in the morning.
How long
Six to seven hours round trip.
Tips
Acclimatize first, start early to avoid afternoon storms, bring insect repellent in early summer and carry layers for cold wind.
Quick picks
- Best for
- Fit, active hikers who want an alpine lake day.
- Families
- Possible for sturdy older children; long for little ones.
- Couples
- A scenic day with mirror-still reflections.
- Pair with
- A picnic in Tuolumne Meadows and Lembert Dome.
- Time needed
- Most of a day.
Good questions
How long is the Cathedral Lakes hike?+
The National Park Service lists it at 7.6 miles round trip with about 1,000 feet of gain, taking six to seven hours.
When is it snow-free?+
Typically from early or mid summer to autumn. Check conditions, since lingering snow can hide the route in early June.
Can I swim in the lakes?+
Swimming is possible but the water is very cold, even in late summer. Stay on durable surfaces to protect shorelines.
Is altitude a concern?+
Yes. The lakes are well above 9,000 feet. Acclimatize if you can, drink water and turn around if you feel unwell.
Where do I start?+
At the trailhead on Tioga Road near Tuolumne Meadows. Parking is limited, so arrive early.
