California State Route 190 California State Route 190 State Route 190 (SR 190) is a state highway in the U.S. state of California that is split into two parts by the Sierra Nevada. The western portion begins at Tipton at a junction with State Route 99 and heads east towards Porterville before ending at Quaking Aspen in the Sequoia National Forest. The eastern portion begins at US 395 at Olancha, heads east through Death Valley National Park, and ends at State Route 127 at Death Valley Junction. The 43.0-mile (69.2 km) portion over the Sierra Nevada remains unconstructed, and the California Department of Transportation
Nevada State Route 373 Valley come into view. The route continues north from here to its terminus at US 95, near the former site of Lathrop Wells. An unimproved road through Amargosa Valley, connecting Nevada to Death Valley Junction, appears on state maps as early as 1927. This route crossed the state line roughly where the current highway crosses now, but instead veered northwest to State Route 5 (now US 95) southwest of Beatty near the now defunct town of Caracca. The road, which paralleled the tracks of the Tonopah and Tidewater Railroad to the west, was recognized as State Route 29 by 1932.