Hike Mount Saint Helena Robert Louis Stevenson State Park, CA

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Apr 23, 2026 — Mount Saint Helena is part of the Mayacamas Mountains, a subrange of the California Coast Ranges. While the views are expansive, it’s unfortunately almost the entire hike follows a service road to communication towers. The hike begins within Robert Louis Stevenson State Park, the popular trailhead that’s just a parking lot along CA-29. More hikers seem to be interested in the Table Rock Trail.

The lower section follows the Stevenson Memorial Trail, a short set of switchbacks that passes historical markers tied to the novelist Robert Louis Stevenson. It’s a good warm-up through the forest, but misleading since it’s the only portion of the hike that is on an actual trail. From there, the trail exits onto a wide service road that continues the long, consistent ascent toward the summit ridge.

As the trees thin out, the hike opens into exposed chaparral. The views expand across Napa, Sonoma, and Lake counties. There are a couple of road switchbacks that can be cut via a social trail. The summit reward for this extensive road walk is a broad, open summit with panoramic views in every direction. It’s a bummer so many beautiful peaks in the Bay Area are overrun by roads rather than trails.

PEAKS ON HIKE
Elevation (ft) / Prominence (ft)

Peaks on hike

Elevation

Prominence

Mount Saint Helena

4341 ft

1832 rise

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Starting up the Stevenson Memorial Trail from within Robert Louis Stevenson State Park.

Some switchbacks through the forest.

The Stevenson Memorial Trail ends at a service road.

Long road switchbacks up Mount Saint Helena. The Palisades Trail and Table Rock (which I did after this) follow the hills seen center.

Views into the valley below.

Some interesting volcanic formations hugging the road.

View back down at my progress.

Mount Saint Helena's East Peak seen left. The true summit is hidden behind it.

View back, Mount Saint Helena's South Peak seen on the right.

Last push to the summit, seen ahead.

Mount Saint Helena summit, view back (east).

Mount Saint Helena summit, view west.

Mount Saint Helena summit, view north.

Close-up down toward the Palisades and Table Rock.

Hire me or show me some love!

Hire/refer me as a web developer or send me a few bucks if you find my site useful. I’m not sponsored, so all fees are out-of-pocket and my time preparing trip reports is unpaid. I really appreciate it!