Seattle to Millwood is 287 miles and takes about 5h 17m via Mount Baker Ridge Tunnel, I 90, and I 5, with a fuel budget near $56 and enough daylight to finish in a day. This trip stays within Washington, starting in the Pacific Coast region and ending in the same region. With a recommended one-day drive and mostly surface roads, it's a straightforward option if you're looking for a direct connection between these two points. You'll spend a good portion of your time on surface roads, so plan for moderate speeds and more frequent intersections than a pure interstate trip.
Trip Pace
Same-day drive is realistic
A same-day return is possible, but it will make for a full day on the road.
Break Rhythm
1 planned break
Plan on a short reset every 3 to 4 hours to stay fresh behind the wheel.
Midpoint
143.5 miles from Seattle, WA
A natural place for your longest stop of the day
, about 2h 38m into the drive
.
Main Roads
Road
Distance
Duration
Mount Baker Ridge Tunnel
274.2 mi
4h 59m
I 90
10.3 mi
12m
I 5
0.6 mi
1m
North Argonne Road
0.4 mi
<1m
North Mullan Road
0.2 mi
<1m
Spring Street
0.1 mi
<1m
4th Avenue
<0.1 mi
<1m
Madison Street
<0.1 mi
<1m
Longest stretch:
Mount Baker Ridge Tunnel
— 274.2 mi, about 4h 59m
Traffic on I-90
Hour-of-day weekday pattern from 221 FHWA count stations on your route.
Peak
4 PM
~2,352 veh/hr typical
· worst 3,009
Quietest
2 AM
~130 veh/hr
Peak-to-quiet ratio
18.1×
busier at peak than in the quiet hours
12a6anoon6p11p
Averaged across 105 weeks of 2023 FHWA Travel Monitoring Analysis System data. Weekday hours only (Mon–Fri).
Turn-by-Turn Driving Directions
Step-by-step road directions between Seattle, WA and Millwood, WA.
1
Start on this road
31 ft·7 sec·this road
2
Turn left onto Madison Street
204 ft·11 sec·Madison Street
3
Turn right onto 4th Avenue
308 ft·14 sec·4th Avenue
4
Turn right onto Spring Street
0.1 mi·26 sec·Spring Street
Use the right lane.
5
Take the ramp
0.2 mi·28 sec
Toward I 5 South: Portland
6
Continue on I 5
0.6 mi·1 min·I 5
Use the left lane.
7
Keep slight left at fork onto I 5
147 ft·2 sec·I 5
Toward I 90 East, I 5 South: Bellevue, Portland
8
Keep slight left at fork
0.4 mi·54 sec
Toward I 90 East: Bellevue, Spokane
9
Merge onto I 90
1.0 mi·1 min·I 90
Use the straight / slight right lanes.
10
Keep slight left at fork onto I 90
274 mi·4 hr 59 min·Mount Baker Ridge Tunnel
Use the straight / slight right lanes.
11
Merge onto I 90; US 2; US 395
9.3 mi·11 min·I 90; US 2; US 395
12
Take the exit
0.4 mi·1 min
Toward Millwood
13
Turn left onto North Mullan Road
0.2 mi·28 sec·North Mullan Road
14
Continue on North Argonne Road
0.4 mi·58 sec·North Argonne Road
15
Arrive at destination
North Argonne Road
Trip Plan
Given the 5h 17m estimated drive time, leaving Seattle in the morning should allow you to reach Millwood with plenty of daylight to spare. The route has only one recommended stop, so you can decide to make it a brief pause or a longer break. Keep an eye on your fuel levels, especially before heading onto longer stretches where services might be less frequent. The majority of this drive is on surface roads, so be prepared for varying speed limits and more interactions with local traffic, particularly as you approach Millwood.
Morning Departure
An early start around 7-8 AM gets you there with plenty of daylight left.
Evening Departure
A late afternoon start means arriving after dark. Morning is better.
You can normally do this drive in one day.
Plan roughly 1 meaningful break for fuel, food, and rest.
The halfway point lands around 143.5 miles from Seattle, WA, or about 2h 38m into the drive.
The longest continuous stretch on this route runs about 274.2 miles.
This is a comfortable same-day trip.
Departure
Before you leave
Start with fuel, water, and navigation already sorted so the first hour feels easy.
First stop
Around 63 miles or 1h 10m in
Use this first pause for coffee, a restroom break, and a quick traffic check ahead.
Halfway reset
Around 143.5 miles or 2h 38m in
This is the best place for your longest stop, a real meal, and a full fuel check.
Final approach
Final hour starts around 4h 18m
Traffic, exits, and arrival timing usually matter more near Millwood, WA than in the middle of the route.
Before You Leave
+
Open the route before leaving Seattle, WA so your first major turns are already loaded.
+
Leave with enough water and a charging cable within reach, not packed away.
+
Check your fuel range against the first long segment, especially if you are starting outside city service areas.
Day 1
Settle into the route from Seattle, WA
This is one driving day of about 287 miles and 5h 17m.
Your first comfortable stop window is around 63 miles from Seattle, WA.
This route can stay practical as a one-day drive if traffic stays reasonable.
Plan about 1 real break rather than only quick fuel stops.
The longest stretch is on Mount Baker Ridge Tunnel for about 274.2 miles.
Where to Stop
Rest stops, refuel points, and overnight suggestions along this route.
Place data sourced from public business listings. Hours and availability may vary.
Heads-up: tricky spots
5 of 11
5 decision points cluster between mile 0 and 2.5 — GPS handles the exact turns, but know they're coming. Your lane choice matters more than the turn itself.
5
0 mi into trip|~0m in|Madison Street
Turn left onto Madison Street
Navigation decision point
7
0.1 mi into trip|~0m in|Spring Street
Turn right onto Spring Street
Lane positioning matters here
Use the right lane.
6
1 mi into trip|~2m in|I 5
Keep slight left at fork onto I 5 toward I 90 East, I 5 South: Bellevue, Portland
Highway fork - watch signs carefully. Multiple destination signs - pick the right one
Toward I 90 East, I 5 South: Bellevue, Portland
6
1.1 mi into trip|~2m in
Keep slight left at fork toward I 90 East: Bellevue, Spokane
Highway fork - watch signs carefully. Multiple destination signs - pick the right one
Toward I 90 East: Bellevue, Spokane
6
2.5 mi into trip|~4m in|I 90 / Mount Baker Ridge Tunnel
Keep slight left at fork onto I 90 / Mount Baker Ridge Tunnel
Highway fork - watch signs carefully. Lane positioning matters here
Use the straight / slight right lanes.
Fuel & Cost
Regular Gas
$60.43 one way
$120.86 round trip
$5.35/gal25.4 MPG avg100 kg CO2
Fuel Type
$/gal
One Way
Round Trip
midgrade
$5.56
$62.78
$125.56
premium
$5.76
$65.04
$130.08
diesel
$5.60
$63.26
$126.53
No toll roads detected on this route.
Estimated Trip Cost (one way, 1 person)
Fuel
$60
Meals
$25–$50
Total
$85–$110
Rough estimate based on US averages. Hotel $80–$140/night, meals $25–$50/day.
Estimated CO2 emission: 100.4 kg one way.
Prices: EIA weekly data, 2026-08-31.
Driving Electric?
About $30 in charging
· 1 stop
· 66% less CO2
Vehicle Type
kWh
Stops
DC Fast
Home Charge
Average EV
86.1
1
$30.14
$13.78
Efficient EV
71.8
0
$25.11
$11.48
EV Truck/SUV
114.8
1
$40.18
$18.37
Gas CO2
100 kg
EV CO2
34 kg (66% less)
Plan for 1 charging stop. A 30-minute DC fast charge mid-route should be enough to complete the trip comfortably.
DC fast charging avg $0.35/kWh. Home charging avg $0.16/kWh. US grid CO2: 0.39 kg/kWh.
Travel Intel
Current conditions at both ends of the drive.
Forecast as of Aug 31, 2026
Origin
Seattle, WA
Late night
in Seattle on Friday
Local time
3:51 AM
PDT
Current temp
55°F
Partly Cloudy
NNE 5 mph1% chanceLive forecast
Destination
Millwood, WA
Late night
in Millwood on Friday
Local time
3:51 AM
PDT
Current temp
48°F
Mostly Clear
E 1 mph1% chanceLive forecast
Seasonal Notes
Summer travel usually means heavier construction, hotter rest stops, and busier weekend traffic around major cities.
Winter travel shortens daylight, so a route that looks manageable on paper can feel much longer after dark.
Holiday weekends tend to make both departure and arrival windows slower than the raw route time suggests.
Time zone
Same local time
Origin and destination are on the same clock, so arrival timing is easier to judge at a glance.
Temperature spread
7 degrees cooler at arrival
A meaningful temperature swing is a good cue to rethink layers, water, and how soon you want to arrive.
Road read
5h 17m on the road
An early start around 7-8 AM gets you there with plenty of daylight left.
Weather data from the National Weather Service. Conditions may change; check closer to your travel date.
National Parks Near This Route
Worth a detour if your schedule allows.
Klondike Gold Rush - Seattle Unit National Historical Park
National Historical Park
Seattle flourished during and after the Klondike Gold Rush. Merchants supplied people from around the world passing through this port city on their way to a remarkable adventure in the Yukon Territory...
Park data from the National Park Service API. Alerts update every 2 hours.
More Details
What kind of drive is this?
This route covers 287 miles, with the longest single stretch being 274.2 miles on Mount Baker Ridge Tunnel. The highway share is roughly 40% of the total distance. Expect to transition from highway cruising to surface roads for a significant portion of your drive. Pay attention as you merge onto and off of I 90 and I 5, as these are major interstates with substantial traffic and exit density.
Only 4% highway — the rest is turn-by-turn surface driving.
15 navigation steps total — most of the decisions cluster near the start and finish.
Longest single stretch: 274.2 mi on Mount Baker Ridge Tunnel.
How Hard Is This Drive?
7/10
Expect a hands-on drive with frequent turns and local roads rather than long highway stretches. This route has several spots where lane changes, forks, or exits need your full attention. The trickiest moment comes early in the drive near Madison Street.
Driving Effort7/10
Demanding - plan breaks and stay ahead of the key maneuvers
Balances navigation complexity with total wheel time.
This is a demanding drive. With 11 significant decision points across 287 miles, you will need to stay alert - especially through interchange areas and urban stretches. Consider splitting it into segments if you are not comfortable with fast highway navigation.
Where does it get tricky?
The main spots that need attention: near the start (Madison Street): Navigation decision point; at 0.1 miles (Spring Street): Lane positioning matters here; at 1 miles (I 5): Highway fork - watch signs carefully. Multiple destination signs - pick the right one.
Seattle, Washington sits at one of the most beautiful spots in the United States. Occupying a narrow isthmus between the Puget Sound and Lake Washington, it is the biggest city in the Pacific Northwest, with 780,000 people in Seattle and over four million people in the metro area. Seen from above, carpets of evergreen trees, pristine blue waters, and snowy white mountains surround the downtown's metallic skyscrapers, earning the city its nickname The Emerald City.
On the ground, you will find a vibrant and cosmopolitan city. Next to the progressive downtown and the freewheeling feel of Capitol Hill, you can find a laid-back atmosphere in the districts to the north and ethnically diverse neighborhoods to the south.
Top landmarks
•Space Needle — observation tower in Seattle, Washington, United States
•Climate Pledge Arena — sports arena in Seattle, Washington, USA
•Museum of Pop Culture — museum in Seattle, Washington, USA
Doable as a same-day drive at 5h 17m. Total distance: 287 miles.
Family Friendly
Moderate complexity with 1 natural rest stops along the way.
Solo Traveler
5h 17m drive, comfortable solo distance.
Scenic Drive
Mostly surface roads route profile with national parks nearby.
Frequently Asked Questions
The longest stretch is about 274.2 miles on Mount Baker Ridge Tunnel. The full list of main roads is in the Roads section above.
Yes — we found about 21 rest areas or service plazas within a short detour of the route (from OpenStreetMap). See the Rest Stops tab under Nearby Places for locations and mile markers. Plan to stretch, use the bathroom, and top off fluids every 2–3 hours on longer drives.
It helps. This route has a higher-than-average number of complex decision points, which get harder in the dark. If the last hour of the trip is on surface roads or mountain grades, aim to arrive at Millwood, WA before sunset when you can. Check the Trip Plan for departure windows that land you in daylight.
Only with planning. This is a long drive for kids — consider splitting it into two days rather than pushing through. Plan at least 1 meaningful breaks. There are 21 rest areas along the route for bathroom stops.
The main spots that need attention: near the start (Madison Street): Navigation decision point; at 0.1 miles (Spring Street): Lane positioning matters here; at 1 miles (I 5): Highway fork - watch signs carefully. Multiple destination signs - pick the right one.
Yes — Klondike Gold Rush - Seattle Unit National Historical Park. See the National Parks section for detour distances and tips on detours.
Not recommended in a single day. At 5.3 hours each way, a round trip means 10.6 hours of driving — that is an unsafe level of fatigue for most drivers. Plan at least one night at Millwood, WA before the return drive.
