Costanoan and Hanna Grove Loop

Starting from the Springbrook Lane trailhead, this scenic loop follows the Costanoan and Hanna Grove trails through the rolling hills of Shell Ridge Open Space. Along the way you'll hike across open grasslands, oak-dotted hillsides, and scenic ridgelines, with expansive views of Walnut Creek, Mount Diablo, and the surrounding Diablo Foothills.

This 3.3-mile loop features 711 feet of elevation gain, making it a rewarding moderate hike with a steady climb and sweeping panoramic views. The combination of peaceful backcountry trails, wide-open landscapes, and elevated overlooks makes it a great choice for visitors looking to experience one of Shell Ridge's quieter routes.

Source: Trail information adapted from AllTrails.