Friday Harbor to Mosier Road Trip Guide: Scenic Route

Friday Harbor sits on San Juan Island at 48.5353° N, 123.0173° W, the county seat reached only by ferry from Anacortes. The drive to Mosier, Oregon, begins with Washington State Ferries Route A1, crossing the Haro Strait where orcas surface in summer. You'll leave the island and trade salt air for high desert sage by the time you descend into the Columbia River Gorge.

How long to drive Friday Harbor, WA to Mosier, OR? Plan for one full day, as the ferry schedule anchors departure times. From the Anacortes terminal, follow State Route 20 east to Interstate 5, then I-5 south to Seattle and I-90 east across the Cascades. In Ellensburg, pick up US 97 south to the Columbia River, then I-84 east to the Mosier exit (milepost 69).

• Fuel stops: Anacortes, North Bend (I-90), Ellensburg, Yakima (US 97), and Hood River (OR) – roughly every 60–70 miles.
• Road quality: Interstate sections are smooth; US 97 has narrow shoulders and rural two-lane stretches.
• Unique marker: Mosier has the only highway tunnel in Oregon (Mosier Twin Tunnels) on the Historic Columbia River Highway.

Is it worth driving Friday Harbor, WA to Mosier, OR? Yes, especially for the reward of the Columbia Gorge's waterfalls, but prepare for long stretches with few services. The Cascade passes (Snoqualmie, elevation 3,022 ft) can be snowy from November to April; check WSDOT pass reports before departure.

Culinary infrastructure includes family-friendly diners like the Pine Tavern in Moses Lake (since 1934) and 3 Rivers Grill in Hood River (kid menu). For coffee and pastries, hit Cafe Yumm! in Bend is off-route, but Hood River's Dog River Coffee (est. 1995) is on the way.

Pet-friendly framework: Many rest areas along I-90 and I-84 have designated pet exercise areas, and most hotels in Hood River and Mosier accept pets for a fee (e.g., $20/night at the Mosier Company). Always pack a water bowl for desert stretches.

Infrastructure safety: The Gorge's I-84 eastbound has a 5% grade near Mosier; use lower gears for descents. Emergency call boxes are available every 2 miles on I-90 east of the pass.

• Hidden off-route spots: the Juniper Dunes Wilderness (near Tri-Cities) offers surreal sand dunes; the Rowena Crest viewpoint (Oregon 30) gives a classic Gorge panorama.
• Fatigue management and rest zones: The Snoqualmie Pass Rest Area (I-90 milepost 52) has picnic tables, Sno-Park; the Rowena Overlook (OR 30) that is a 15-min detour for a break.
• Family suitability: OMSI in Portland (science museum) is a draw for kids, but Mosier's own track trail (old railroad bed) is a safe pedal for little ones.

The route crosses three distinct geologic provinces: the Puget Trough, the Cascade Range, and the Columbia Plateau. On clear days, Mount Rainier (14,411 ft) appears from I-5 near Tacoma, and Mount Adams looms over the Gorge. In Mosier, the landscape shifts to rolling grasslands and basalt cliffs shaped by Ice Age floods.

UNESCO World Heritage Sites aren't on the main route, but the nearby Fort Vancouver National Historic Site (NHL, not UNESCO) honors the fur trade era, a short detour in Vancouver, WA.

For local commerce, stop in Ellensburg for handmade leather goods at the Kittitas County Farmers Market (Saturdays), or grab fresh fruit at one of the Hood River fruit stands (peak season: cherries in June, pears in September).

To tailor your how to find the best stops and hidden gems between cities start by identifying clusters of points of interest along this corridor.