The Fossil Hill, Briones to Mt. Diablo, Ginder Gap, and Coral Spring Loop horse trail is a 3.7 mile Out & back trail that wanders through the Shell Ridge Open Space and . This trail is accessible in Spring, Summer, Fall, Winter.
The Fossil Hill, Briones to Mt. Diablo, Ginder Gap, and Coral Spring Loop horse trail is a 3.7 mile Out & back trail that wanders through the Shell Ridge Open Space and . This trail is accessible in Spring, Summer, Fall, Winter.