Diablo Lake + Washington Pass • 2 hrs from Seattle

One of Washington’s most underrated day trips — turquoise water, dramatic mountain passes and some of the best views in the North Cascades without needing a big hike.

This route is perfect if you want the North Cascades experience in one day but don’t want to spend half of it hiking. You’ll drive the incredibly scenic Highway 20, stop at Diablo Lake and continue into the mountains to Washington Pass.

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Before you go

• Last gas: Sedro-Woolley
• Coffee: Marblemount
• Pass: None
• Restrooms: Vault
• Road: SR20 closed Nov–June
• Weather: Summer 70–86°F; the pass is about 20°F colder </aside>

The Route

From Seattle, take Hwy 20. Views start after Marblemount.

First stop — Diablo Lake

Big turquoise lake right off the road. Picnic tables; best photo from the left side mid-morning.

Drive 30 mins ahead

Road gets curvy, with no services.

Second stop — Washington Pass Overlook

Short paved path to 360° views. Highest point and windier.

Photo Tips

• Diablo Lake is best 10am–12pm for true turquoise; a polarizer helps.
• Washington Pass: use a wide 16–24mm lens and watch for wind shake.
• Bring layers — the pass can be 20°F colder than the lake.
• Weekdays before 10am mean emptier overlooks.