Explore Arnold
Sonora Pass
The second-highest road over the Sierra Nevada at 9,624 feet, and the most dramatic drive within reach of the cabins — steep, narrow, breathtaking, and closed by snow for half the year.
First things first
First things first
Sonora Pass is where Highway 108 climbs out of the forest, runs out of trees, and crosses the Sierra crest at 9,624 feet before dropping to Highway 395 on the eastern side. Only Tioga Pass in Yosemite is higher. The last miles on either side include sustained twenty-six percent grades, hairpins with no shoulder, and views that make passengers go quiet.
From Arnold it is a long day: roughly two and a half hours to the summit by way of Sonora and the full length of Highway 108, and the same back unless you make a loop of it. It is a drive taken for its own sake, not a shortcut to anywhere useful.
Geography
Where Sonora Pass sits
Sonora Pass is the second-highest highway crossing of the Sierra Nevada, linking the Stanislaus forest with Highway 395 on the eastern side.
The last miles on both sides climb above treeline on sustained grades, which is why the road closes with the first serious storms each autumn.
The summit is about 100 miles from Chalet Bruin and Koda Loft via Sonora — roughly two and a half hours each way.
- Region
- Sierra Nevada crest, Highway 108
- County
- Tuolumne and Mono counties
- Elevation
- 9,624 ft at the summit
- Nearest town
- Kennedy Meadows to the west; Bridgeport is about an hour east
- Getting there
- Highway 108 east, open only in the snow-free season
The drive, honestly
Above Kennedy Meadows the road narrows and steepens in earnest. Motorhomes and anything towing a trailer should not attempt it — Caltrans advises against vehicles over a certain length, and the switchbacks near the summit are tight enough that oncoming traffic requires care from an ordinary car. Use low gear on the descent rather than riding the brakes.
At the top there is a small pullout, a trail crossing and an enormous amount of sky. The Pacific Crest Trail crosses here, so in July and August you will see through-hikers resupplying. There is no fuel, food or water anywhere near the summit; fill up in Sonora or on Highway 395.
The season, and why it moves
The pass closes with the first serious storms, typically in November, and reopens once Caltrans can clear and repair the road — historically somewhere between late April and early June, later after heavy winters. Those are patterns, not promises: the only reliable answer for a given day is the current Caltrans road status for Highway 108.
Even in the open season, early-summer mornings at the summit can sit below freezing, and thunderstorms build fast on August afternoons. Snow in June is normal. Take a warm layer regardless of what the thermometer in Arnold said when you left.
Walks and stops along the way
The corridor below the summit is the point as much as the top: Kennedy Meadows, the Columns of the Giants, Donnells Vista and the Trail of the Gargoyles are all on the way up, and each is a fifteen-minute stop rather than an expedition. Above treeline, short walks from the pullouts get you into granite and whitebark pine in minutes.
If you carry on east, the drop to Highway 395 through the Walker River canyon is spectacular in its own right, and Bridgeport is about an hour beyond the summit. That makes a very long day from Arnold — plan for it deliberately, or turn round at the top.
Where to stay for a Sonora Pass day
Nothing on the corridor above Pinecrest is set up for casual lodging, and the far side is hours away. Basing in Arnold means an early start and a good bed at the end of it, with Big Trees, Bear Valley and the caverns available on the days you do not feel like five hours of driving.
Nearby
Keep exploring
Good to know
Frequently asked questions
When is Sonora Pass open?+
Usually from somewhere between late April and early June until the first big storms in November, later to open after heavy winters. Check the current Caltrans status for Highway 108 before you go — the dates move every year.
How high is Sonora Pass?+
9,624 feet, the second-highest highway pass over the Sierra Nevada after Tioga Pass.
Can you drive it in a motorhome or with a trailer?+
No. The grades reach twenty-six percent with tight hairpins, and Caltrans advises against long vehicles and trailers. Take an ordinary car and use low gear on the descent.
How long does it take from Arnold?+
About two and a half hours each way to the summit via Sonora and Highway 108. Treat it as a full day, and fill the tank before you leave the towns.