The Elderberry Trail at Las Trampas Regional Wilderness is a moderate 2.1-mile one-way trail that connects to the Rocky Ridge View Trail and has amazing views of the mountainous wilderness.
This recording starts at the end of the Rocky Ridge View Trail; however, you can hike this trail in any direction and even make a 5.2-mile loop with the Rocky Ridge View Trail if you like. If you plan to hike up this trail, it's a moderate-to-difficult hike considering the elevation gain. If you plan to hike this trail down, it's a much easier and pleasant hike after hiking up the Rocky Ridge View Trail.
Parking: Parking can be found at the main lot at the end of Bollinger Canyon Road in Moraga, CA.
Pets: Dogs are allowed if they are leashed and waste is carried out.
For more details check out this NorCal Hiker blog post.