How far is Seattle, WA from Trentwood, WA?
The driving distance from Seattle, WA to Trentwood, WA is about 290.6 miles (467.6 km), with a travel time of about 05h 24m by car.
- The straight-line flight distance is about 238.4 miles (383.7 km).
- For a round trip, plan for roughly 10h 48m of driving time before adding stops, traffic, or weather delays.
- A comfortable departure window is usually 6:00 AM to 8:00 AM PDT.
Reverse, save, or send this route
This drive is better planned with a longer stop or an overnight stay. Copy the route link, send it to another device, or print a clean version before you head out.
This drive is better planned with a longer stop or an overnight stay.
Flight Distance
Driving Distance
Gas Cost Calculator
Leave and Arrive Planner
Pick a departure time to see your estimated arrival and same-day return window.
Drive time stays fixed at 05h 24m.
An early departure helps you fit a real stop into the day without turning the return into a late-night drive.
You are leaving earlier than the recommended window, which gives you extra margin for breaks and traffic.
Halfway Point
A useful midpoint for breaks, coffee, or meeting in the middle.
City in Washington, USA
Route Weather Snapshot
Check the forecast at both ends before you head out.
Chance Rain Showers
Driving Route Map
The map below follows the saved road route between Seattle and Trentwood.
Turn-by-Turn Driving Directions
Step-by-step road directions between Seattle and Trentwood.
-
1
Start on the route
9 m · 8 sec
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2
Turn left onto Madison Street
62 m · 11 sec · Madison Street
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3
Turn right onto 4th Avenue
94 m · 15 sec · 4th Avenue
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4
Turn right onto Spring Street
647 ft · 26 sec · Spring Street
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5
Take the ramp right toward I 5 South: Portland
1151 ft · 28 sec
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6
Continue straight
3180 ft · 1 min
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7
Keep slight left to continue on I 90 East, I 5 South: Bellevue, Portland
45 m · 2 sec
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8
Keep slight left to continue on I 90 East: Bellevue, Spokane
2257 ft · 55 sec
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9
Merge slight left
1.6 km · 1 min
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10
Keep slight left to continue on Mount Baker Ridge Tunnel
274.2 mi · 4 hr 59 min · Mount Baker Ridge Tunnel
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11
Merge slight right
9.3 mi · 12 min
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12
Take the exit slight right toward Millwood
2137 ft · 1 min
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13
Turn left onto North Mullan Road
1098 ft · 29 sec · North Mullan Road
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14
Continue on North Argonne Road
1982 ft · 55 sec · North Argonne Road
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15
Turn right onto East Trent Avenue
3.5 mi · 6 min · East Trent Avenue
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16
Turn left onto North Ellen Road
617 ft · 27 sec · North Ellen Road
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17
Arrive at your destination
0 m · 1 sec · North Ellen Road
Car Route Details
A richer read on the saved driving route between Seattle and Trentwood.
Straightforward drive
The saved road route has a manageable number of maneuvers and should be easy to follow with normal attention to signs.
Mount Baker Ridge Tunnel
Keep slight left to continue on Mount Baker Ridge Tunnel
274 mi · 04h 59m
Route Summary
A quick read on whether this route feels easy, ambitious, or worth planning around.
A longer out-and-back drive
This is still possible in one day, but it becomes a long driving day. Leaving early and planning your stop window matters more here.
Mostly Sunny leaving Seattle and Chance Rain Showers near Trentwood.
Trip Questions
Direct answers travelers usually want before committing to the drive.
How long does it take to drive from Seattle to Trentwood?
The road trip is about 290.6 miles (467.6 km) and usually takes 05h 24m in normal driving conditions.
Is this a same-day trip or an overnight route?
This is still possible in one day, but it becomes a long driving day. Leaving early and planning your stop window matters more here.
What is the halfway point on this route?
George is a useful midpoint, sitting about 145 miles from Seattle and 145.6 miles from Trentwood.
How much longer is the road route than the straight-line distance?
The direct path is about 238.4 miles (383.7 km), while the road route adds roughly 52.2 extra miles because roads do not follow the straight air line.
When is the best time to leave for this route?
A good departure window is usually 6:00 AM to 8:00 AM PDT. If you want a more comfortable same-day return, try to leave by 6:12 AM PDT.
How much will gas cost for this route?
Using about 28.3 MPG, regular gas is estimated at $53.64 one way or $107.28 round trip. Estimated CO2 is about 91.1 kg one way.
What should you check before leaving?
Before you leave, expect Mostly Sunny around Seattle and Chance Rain Showers near Trentwood.
Stop Ideas Near George
Useful break, food, and waypoint ideas within about 15 miles of the route midpoint.
Transit and Meeting Points
Useful pickup, handoff, or rendezvous points close to George.
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Flight Path Map
This map shows the direct air route between Seattle and Trentwood. Straight-line distance: 238.41 mi (383.68 km).
#1 Seattle
The eighteenth most populous city in the United States and the center of the Seattle metropolitan area.
| Population | 769,714 |
| Coordinates | 47.6062100, -122.3320700 |
| Altitude | 56 |
| Country | United States |
#2 Trentwood
Census designated place
| Population | 4,450 |
| Coordinates | 47.6965600, -117.2107600 |
| Altitude | 618 |
| Country | United States |
End: Trentwood (-117.21076, 47.69656)
Estimated Travel Time
Distance: 468 km by road
| Speed | Time |
|---|---|
| 30 mph (48.3 km/h) | 09h 40m |
| 40 mph (64.37 km/h) | 07h 15m |
| 50 mph (80.47 km/h) | 05h 48m |
| 60 mph (96.56 km/h) | 04h 50m |
| 70 mph (112.65 km/h) | 04h 09m |
| 80 mph (129 km/h) | 03h 37m |
Fuel, Round Trip and CO2
Estimated fuel cost and emissions for this route.
| Fuel | $/gal | One way | Round trip |
|---|---|---|---|
| Regular gas | $5.23 | $53.64 | $107.28 |
| Mid-grade | $5.57 | $57.06 | $114.12 |
| Premium | $5.77 | $59.15 | $118.31 |
| Diesel | $5.47 | $56.04 | $112.07 |
Assumes 8.3 L/100 km (about 28.3 MPG). CO2 is an estimate and varies by vehicle, fuel blend, traffic, and terrain.
Prices in Washington · Jun 10, 2026
Distance to Other Cities
Planning a road trip? See the full trip guide on Trip.ovh — stops, fuel costs, weather, and departure timing.