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The Atlas/Washington/White Pass (US-12)

White Pass (US-12)

350 mi
Length
5
Verified stops
2,750 ft
High point
Scenic
Road type

US-12 crosses the Cascades at White Pass (4,500 ft) and runs 124 miles between I-5 near Castle Rock and Naches, passing through the shadow of Mount Rainier, Mount St. Helens, and Mount Adams. Designated a National Scenic Byway, the highway is the only year-round Cascades crossing between Snoqualmie Pass (I-90) and the Columbia River Gorge (WA-14). Two-lane mountain curves thread through the Gifford Pinchot National Forest with minimal traffic compared to the northern passes.

// Mile by mile

What you'll hit along the way.

Rider-verified stops, overlooks, fuel, and the corners worth knowing about — in the order you'll meet them.

Mile 0.0

Lewiston

Twin-city starting point at the confluence of the Snake and Clearwater rivers, offering services and a low-elevation launch into the route.

Mile 30.0

Pomeroy

Small county seat in the Tucannon River valley, a good early stop for fuel or a stretch before the open plateau ahead.

Mile 190.0

Arco

Reliable fuel stop roughly at the midpoint of the route where services become available again after a long rural stretch.

Mile 255.0

CFN

Fuel stop in the Yakima Valley corridor as the route descends toward lower terrain.

Mile 350.0

Attalia

Small community near the Columbia River marking the western end of the route near the Tri-Cities area.

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// Nearby & related
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Chinook Pass (WA-410)
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WA-410 climbs from the Naches River valley west through the Cascades to Chinook Pass at 5,430 feet on the eastern boundary of Mount Rainier National Park, then descends into Enumclaw. The 95-mile run offers consistent two-lane curves through old-growth forest, subalpine meadows, and river canyon — peaking at Tipsoo Lake with a direct view of Mount Rainier across the water. The road is designated an All-American Road as part of the Chinook Pass Scenic Byway. Seasonal closure applies: the summit section is typically closed November through late May due to snow.
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