State Route 20 stretches from Port Townswend, on the west, to Newport, on the east. The north Cascades Pass starts east of Newhalem and runs east over the Cascades towards Twisp.
A close up view of the pass, from gate to gate. The Ross Dam Trailhead is where we close the North Cascades Highway on the west side of the Cascades. Ross Dam Trailhead is several miles east of the town of Diablo. Silver Star Gate is where we close the highway on the east side of the Cascades.