This 0.7-mile segment under the Butler Bridge connects Anselmo Court with Soscal Ferry Road and hosts the Napa River Trail, the Bay Area Ridge Trail, and the Napa Valley Vine Trail. Access to the trail at this time is from the western end of Soscal Ferry Road, where one can park on the side of the road. This is a great path to view the Napa River and the underside of the Butler Bridge and is popular with anglers and bird watchers.