Sister Rocks
Mountain in Washington · 4,144 ft
The hike up Sister Rocks
The route starts at Observation Peak 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 Sister Rocks?
Sister Rocks is 4,144 ft above sea level and lies in Washington. Its prominence is 728 ft — how far the summit rises above the surrounding terrain.
How long is the hike up Sister Rocks?
From Observation Peak Trailhead it is about 1.4 mi one way with 719 ft of ascent. Expect around 1 h 20 min round trip at a normal hiking pace.
Where do you park for Sister Rocks?
The nearest parking is Observation Peak Trailhead (north of the peak) — 1.4 mi on foot · ↑ 719 ft · about 1 h 20 min round trip. Alternative: Big Hollow Trailhead (east of the peak) (about 4.1 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 Sister Rocks in Conquer?
Yes — Sister Rocks 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 Sister Rocks 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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