Pacific Grade East

Pacific Grade (Route 4) is the western of the two passes in the area traversed by Route 4. At the end of the descending backside of Ebbets pass, the road flattens through quaint Hermit Valley and then embarks on a short, two-mile, meandering ascent up to the apex of Pacific Grade (8,050 feet). This is the most arduous of climbs on the list, as the highway rises approximately 500 feet in elevation per mile, boasting a 25% grade in some spots. Get ready to use your granny gear for this Billy goat of a climb! Source: