Lake Tahoe is a large freshwater lake in the Sierra Nevada Mountains, straddling the border of California and Nevada. It’s known for its beaches and ski resorts. On the southwest shore, Emerald Bay State Park contains the 1929 Nordic-style mansion Vikingsholm. Along the lake’s northeast side, Lake Tahoe Nevada State Park includes Sand Harbor Beach and Spooner Lake, a gateway to the long-distance Tahoe Rim Trail.