Peak

Mount Saint Helena

Mayacamas Mountains, Robert Louis Stevenson State Park
Summit elevation4,341 ft1,323 m
DifficultyClass 1Typical
SeasonYear roundCheck conditions first
Members onlyDistance and elevation gain

About this peak

Mount Saint Helena (4,341 feet) in the Mayacamas Mountains is the tallest peak in the Bay Area Six-Pack and one of the few that sees snow in winter. The recommended Six-Pack route is the out-and-back Mount St. Helena Trail from the Stevenson Memorial Trailhead in Robert Louis Stevenson State Park, about 10 miles with roughly 2,100 feet of vertical gain. The first mile is the steepest, and the summit can be windy, so bring layers.

Know before you go

Hazards

The first mile is the steepest, and some sections are rugged, rocky, and narrow. The trail is shared with road traffic on the fire road, including utility vehicles, mountain bikers, and rock climbers, and confusing side trails near the top are easy to take by mistake. Summer afternoons are hot with little shade high on the route, while winter can bring snow and slush, and the summit is often gusty. Cross the busy road carefully at the trailhead.

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