10.1 miles round trip.
From: Skyline Park entrance
To: Skyline Park South boundary
East of Napa State Hospital in the southern foothills of Napa Valley, this out-and-back trail is for hardy hikers and careful equestrians and mountain bikers. It is a narrow, often rocky trail with limited visibility. After a steep climb in the first mile, this trail ambles through oak forests and high grasslands to views of North Bay marshes and mountains and then continues beside a perennial stream to the far reaches of the park.