Mount Saint Helena Trail

Parking for the Mount Saint Helena Trail is available at the Robert Louis Stevenson State Park trailhead. It's located on Highway 29, just north of Calistoga. Be aware that parking can be limited, especially on busy days, so arriving early is recommended to secure a spot.

No, there are no entrance fees or permits required to hike the Mount Saint Helena Trail within Robert Louis Stevenson State Park. The park is free to access.

Dogs are generally not allowed on the trails within Robert Louis Stevenson State Park, including the Mount Saint Helena Trail. It's best to leave your furry friends at home for this hike.

The trail is popular year-round, with each season offering a different experience. Spring brings wildflowers, while winter can transform the landscape into a 'winter wonderland' with snow, though icy conditions may require crampons. Fall offers pleasant temperatures. Summer can be very hot due to the trail's exposure, so an early start is crucial.

The Mount Saint Helena Trail is generally rated as moderately strenuous to hard. While the grade is steady, the length and significant elevation gain (around 2,100 to 2,300 feet) make it challenging. It's best suited for hikers with at least moderate fitness and some experience with longer, exposed climbs.

The initial mile is a narrow, shaded path with rocky sections and tree roots, featuring switchbacks and a steep climb. After this, the trail opens onto a wide fire road for the majority of the ascent. This fire road is mostly exposed, with loose gravel and rocks that can be slippery, especially on the descent. You'll also encounter volcanic rock formations.

The trail offers increasingly expansive vistas of Calistoga, Sonoma, and the Napa Valley. From the Mount Saint Helena south summit, on a clear day, you can enjoy 360-degree views extending to Mount Tamalpais, Mount Diablo, the San Francisco Bay, and even the Sierra Nevada mountains. You'll also pass a monument marking Robert Louis Stevenson's cabin site.

Yes, the route also passes through sections of the Bay Area Ridge Trail - 01 - North Bay, the Mount Saint Helena Trail, the Stevenson Memorial Trail, the Approach trail to The Bear, and South Peak Road.

The trailhead itself is fairly rustic, with limited amenities. However, the town of Calistoga is just a short drive away, offering a variety of cafes, restaurants, wineries, and breweries where you can refuel and relax after your hike.

Given the trail's length and exposure, it's crucial to bring ample water, especially on warm days. Sun protection (hat, sunscreen, sunglasses) is essential. Sturdy hiking boots are recommended for the varied terrain. Layers of clothing are also wise, as temperatures can change. In winter, consider bringing crampons if snow and ice are present.

The Mount Saint Helena Trail is an out-and-back route. You will hike to the summit and return along the same path.