O'Brien Mountain
Mountain in California · 2,635 ft
The hike up O'Brien Mountain
The route starts at Waters Gulch Trailhead — recommended parking for the shortest hike to the top.
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Next 10 daysParking and starting point
Check signage and any parking fees on site.
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Frequently asked questions
How high is O'Brien Mountain?
O'Brien Mountain is 2,635 ft above sea level and lies in California. Its prominence is 1,352 ft — how far the summit rises above the surrounding terrain.
How long is the hike up O'Brien Mountain?
From Waters Gulch Trailhead it is about 3.0 mi one way with 1,437 ft of ascent. Expect around 2 h 47 min round trip at a normal hiking pace.
Where do you park for O'Brien Mountain?
The nearest parking is Waters Gulch Trailhead (south of the peak) — 3.0 mi on foot · ↑ 1,437 ft · about 2 h 47 min round trip. Alternative: Packers Bay Boat Parking (south of the peak) (about 3.6 mi to the summit). In the Conquer app you get driving directions to the trailhead and a hiking route to the summit.
Can I log O'Brien Mountain in Conquer?
Yes — O'Brien Mountain is one of 49,213 peaks in United States in Conquer. On the summit, open the app and tap to log the conquest — GPS verifies you're really there. No one has logged this peak yet — you could be the first.
Conquer O'Brien Mountain in the app
Check in on the summit, verified by GPS. Collect peaks across United States, build streaks and level up together with your friends.
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