Seattle to Yellowstone RV Trip — 10-Day Cross-Pacific Northwest Route
Typical rate: $4,600-$5,300 all-in for two people, 10 days
Take this route with you Tap to open the full route in Google Maps — save it or start turn-by-turn navigation from your phone. Open in Google Maps → In four days you go from temperate rainforest to high-desert dark skies to a caldera that steams — few American road trips change the scenery under you this completely. The Seattle-to-Yellowstone run is a big-country RV trip: roughly 1,400 miles round trip across Washington, Idaho, and into the Yellowstone country, stringing together Mount Rainier, the Idaho Sawtooths, and the geyser basins. It rewards ten days and a tolerance for distance. Here’s the route from Seattle, updated for the two things that changed in 2026.
What does the route look like at a glance?
Ten days, about 1,400 miles round trip, four states, best July through August.
- Origin: Seattle, WA — Destination: Yellowstone (return to Seattle, or one-way to Jackson)
- Distance: ~1,400 miles round trip
- Recommended class: Class C 26-30 ft
- All-in budget: $4,600-$5,300 for two people
- Best months: July–August (full road and campground access)
What changed for 2026?
Mount Rainier dropped its timed-entry reservation, and Yellowstone’s booking runs on two systems. Two things worth knowing before you plan.
- Mount Rainier: no timed-entry reservation for 2026 — just a park pass. Arrive early; Paradise and Sunrise lots still fill on summer weekends.
- Yellowstone: Madison books through Yellowstone National Park Lodges (Xanterra); Mammoth books through Recreation.gov. See the full breakdown in our Yellowstone + Grand Teton guide.
Day-by-day route
Days 1-2: Seattle → Mount Rainier
Pick up in Seattle and drive to Cougar Rock below Paradise. Spend a full day in the subalpine wildflower meadows — the Skyline Trail loop with the mountain filling the sky — and catch the reflection at Reflection Lakes. Camp: Cougar Rock (~$25).
Day 3: Rainier → Spokane
The long transit east across the Cascades and the Columbia Plateau to Spokane. Set up at Riverside State Park on the river. Camp: Riverside (~$25-$35).
Days 4-5: Spokane → the Idaho Sawtooths
Drop south into Idaho to Stanley and the Sawtooth National Recreation Area — jagged peaks over Redfish Lake, hot springs, and some of the darkest skies in the country (a certified Dark Sky Reserve). Hike toward Bench Lake and soak at Iron Creek. Camp: Redfish Lake (~$30).
Day 6: Sawtooths → Yellowstone (Madison)
The run east on US-20 to Yellowstone’s west entrance and Madison Campground, at the confluence where the geyser country begins. Camp: Madison.
Days 7-8: Yellowstone loop
Old Faithful and Grand Prismatic on the lower loop, then north to the Grand Canyon of the Yellowstone, Norris, and Mammoth Hot Springs, with an evening in Lamar Valley for wildlife. Camp: Madison, then Mammoth.
Days 9-10: Yellowstone → Seattle (or Jackson)
Head to Bozeman for the night, then the long haul back to Seattle — split it with a Spokane overnight if you can. Or drop one-way in Jackson and skip the return entirely.
What does it cost all-in?
About $4,600-$5,300 for two round trip — and Pacific Northwest fuel is the line that hurts. Our July 2026 pull of 3,398 live listings put the national median at $150/night; a Seattle Class C runs above it, and regional gas sits well over the national average. Treat these as a research-date snapshot.
| Line item | Amount |
|---|---|
| Class C rental: $215/night × 10 | $2,150 |
| Booking fees + insurance + cleaning | $550–$750 |
| Fuel (1,400 mi @ 7 mpg @ $4.15/gal, PNW) | $830 |
| NPS America the Beautiful pass | $80 |
| Campgrounds (NPS + state + private) | $300–$450 |
| Food, propane, dining (2 people) | $700–$1,000 |
| All-in, 10-day round trip | $4,610–$5,260 |
A one-way drop in Jackson adds $400-$1,000 but saves the 700-mile return and two rental days. Our RV rental cost guide covers the method.
Which RV class fits the route?
A Class C, 26-30 ft — fits every campground and handles the grades.
| Class | Seattle-to-Yellowstone fit |
|---|---|
| Class B under 22 ft | Fits everywhere; cramped for ten days |
| Class C 26-30 ft | The sweet spot — all NPS campgrounds work |
| Class A 35+ ft | Length limits at both parks — skip it |
What goes wrong out here — and how do you handle it?
The route’s challenge is distance and altitude, not complexity.
- Parking full at Rainier: no reservation needed in 2026, but be at Paradise/Sunrise early on weekends.
- Long transit days: Spokane-to-Stanley and Stanley-to-Yellowstone are 6-hour drives — start early and split if you can.
- Yellowstone sites gone: book Madison and Mammoth six months out through their separate systems.
- The return haul: 700 miles Bozeman-to-Seattle is brutal in a day — overnight in Spokane, or go one-way.
- Cold nights: even July drops near freezing in the Sawtooths and Yellowstone.
Bottom line
The 10-day Seattle-to-Yellowstone route is the great Pacific Northwest mountain crossing — rainforest to alpine to geysers in one trip. Budget $4,600-$5,300 round trip, run a Class C 26-30 ft, book Yellowstone’s two systems six months out, and seriously weigh the one-way to Jackson. See our Seattle and Washington guides, the Idaho state guide, Mount Rainier and Yellowstone park guides, and the Yellowstone + Grand Teton route.
Frequently Asked Questions
Do you need a reservation for Mount Rainier in 2026?
No. Mount Rainier cancelled its timed-entry reservation system for 2026 — you don't need a booking for the Paradise or Sunrise corridors, just a park entrance pass. The park is managing crowds with parking staffing and real-time signage instead. The catch is the same as everywhere out here: the Paradise and Sunrise lots fill on peak summer weekends, so be through the gate early.
How do you book Yellowstone campgrounds on this route?
Through two different systems in 2026, which surprises people. Madison — the natural base coming in the west entrance — books through Yellowstone National Park Lodges (the Xanterra concessioner), while Mammoth on the north side books through Recreation.gov. Both release six months ahead and sell out fast for summer. Our Yellowstone + Grand Teton guide breaks the whole booking picture down.
What does a Seattle-to-Yellowstone RV trip cost?
About $4,600-$5,300 all-in for two over ten days round trip: roughly $2,150 for a Class C at $215/night, $550-$750 in fees and insurance, ~$830 in Pacific Northwest fuel across 1,400 miles, an $80 park pass, $300-$450 in campgrounds, and $700-$1,000 for food. Fuel is the trip's defining cost — the distance is real.
Is it worth doing one-way to Jackson instead of returning to Seattle?
Often, yes. A one-way drop in Jackson cuts the 700-mile return drive and about two days of rental time, at the cost of a $400-$1,000 one-way fee. If your goal is to see the country rather than retrace it, the one-way usually nets out ahead once you count the fuel and rental days you save on the return leg.
What size RV works for this route?
A Class C, 26-30 feet. It fits every national-park campground on the route — Cougar Rock at Rainier, Redfish Lake in the Sawtooths, Madison and Mammoth in Yellowstone — and handles the mountain grades. Class A rigs over 35 feet run into campground length limits at both parks; a sub-22-foot van fits everywhere but gets cramped over ten days.
When should you drive it?
July and August, when the Cascades are clear of snow, the Sawtooth passes are open, and Yellowstone's full interior loop is running. September is a quieter shoulder with a real chance of early snow at altitude. Yellowstone's interior roads close to regular vehicles November through April, so this is firmly a summer route.