West Saddle Dam

Embark on an easy hike around Lake Ralphine, a pleasant 2.5 miles (4.0 km) loop that takes about 1 hour and 4 minutes to complete. You will experience a gentle elevation gain of 146 feet (45 metres) as you explore the area. The route offers picturesque views of both Lake Ralphine and Spring Lake, with the Sullivan Ridge Trail winding through areas dotted with thick oak trees and moss-covered boulders, providing a serene natural backdrop.

For your visit, you will find convenient parking available at both Howarth Memorial Park and Spring Lake Regional Park, making access straightforward. The trail system is known for its accessibility, particularly the paved Spring Lake Loop, which is suitable for various modes of travel. This makes it an ideal spot for a relaxed outing, whether you are walking or using other mobility aids.

This trail offers a diverse blend of urban park amenities and natural beauty, allowing you to spot over-wintering gulls, ducks, and various woodland birds near the lakes. The route seamlessly connects Howarth Memorial Park, Spring Lake Regional Park, and Trione-Annadel State Park, providing a continuous outdoor adventure and a chance to explore a wider network of trails in the region.

Embark on a difficult hike along the Bay Area Ridge Trail from Spring Lake to Trione-Annadel State Park, a challenging 13.8-mile (22.2 km) route. You will navigate varied terrain, transitioning from open grassy hillsides to dense oak woodlands and conifer forests. The trail offers a rewarding experience, with a total elevation gain of 1399 feet (426 metres) that will take you approximately 6 hours and 9 minutes to complete. Keep an eye out for the shimmering waters of Spring Lake as you begin, and later, the scenic Lake Ilsanjo nestled within Trione-Annadel State Park, known for its unique volcanic rock formations.

Before you head out, be aware that this trail is popular with mountain bikers, so stay alert on shared paths. While there are no specific warnings about snow or road closures, you should always check local park information for current conditions, especially regarding parking and trailhead access. Be mindful of potential wildlife encounters with rattlesnakes, mountain lions, and ticks, and learn to identify and avoid poison oak along the route. Planning your visit during cooler months might enhance your experience.

This segment of the Bay Area Ridge Trail is notable for its rich natural environment, particularly within Trione-Annadel State Park. During spring, the park comes alive with a vibrant display of wildflowers, including lupines and iris, adding splashes of color to your journey. You might also discover shiny black obsidian shards on the ground, a fascinating hint at the area's volcanic past and its long history of human activity. This trail offers a deep dive into Sonoma County's diverse landscapes and geological heritage.