The Central Valley has major connections to other regions: The Mojave Desert via Tehachapi and Walker passes, Eastern California via Tioga, Sonora and Carson passes, the Central Coast via Polonio and Cottonwood passes, and State Route 198, The San Francisco Bay Area via Pacheco and Altamont passes, Nevada via Donner Pass, Lake Tahoe via Echo Summit, Susanville region via Beckwourth and Fredonyer passes, Shasta Lake via Interstate 5, and Southern California via Tejon Pass and the Grapevine