The road reverted to a free county road in 1911 and was accepted into the California State Highway system in 1926 as California State Route 4. It was not until the early 1950s that the road over Monitor Pass to U.S. Route 395 was completed, connecting the eastern terminus of State Route 4 to U.S. Route 395 via California State Route 89 near the community of Topaz, California. Today's Ebbetts Pass National Scenic Byway is a very scenic drive but one of the least traveled highways across the Sierra Nevada Mountains. It is anchored at either end by two state parks—Calaveras Big Trees State Park and Grover Hot Springs State Park. It passes through the Stanislaus and Humboldt-Toiyabe National Forests. Today's Ebbetts Pass road, SR 4, has an extensive section of highway that is less than two lanes wide with no dividing line. It also has some very steep sections, particularly on the eastern Sierra slopes, with several sharp hairpin corners. It is not recommended for vehicles towing long trailers or commercial truck traffic. Watch out for bicyclists and motorcyclists.