How far is Federal Way, WA from Coulee Dam, WA?
The driving distance from Federal Way, WA to Coulee Dam, WA is about 235.5 miles (379 km), with a travel time of about 04h 52m by car.
- The straight-line flight distance is about 161.6 miles (260 km).
- For a round trip, plan for roughly 09h 44m 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 04h 52m.
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 Kittitas County, Washington, United States
Route Weather Snapshot
Check the forecast at both ends before you head out.
Mostly Sunny
Sunny
Driving Route Map
The map below follows the saved road route between Federal Way and Coulee Dam.
Turn-by-Turn Driving Directions
Step-by-step road directions between Federal Way and Coulee Dam.
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1
Start on the route
7 m · 7 sec
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2
Turn left onto South 312th Street
48 m · 6 sec · South 312th Street
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3
Turn left onto Pacific Highway South
2669 ft · 1 min · Pacific Highway South
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4
Turn left onto South 320th Street
1.4 mi · 3 min · South 320th Street
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5
Continue on South Peasley Canyon Road
1 mi · 2 min · South Peasley Canyon Road
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6
Enter the roundabout and take exit 2 toward South Peasley Canyon Road
29 m · 2 sec · South Peasley Canyon Road
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7
Exit the roundabout onto South Peasley Canyon Road
1.2 km · 1 min · South Peasley Canyon Road
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8
Turn left onto West Valley Highway North
102 m · 11 sec · West Valley Highway North
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9
Take the ramp right toward WA 18 East, WA 167 North: Renton, North Bend
1154 ft · 28 sec
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10
Keep slight left to continue on WA 18 East
1261 ft · 31 sec
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11
Merge slight left onto State Route 18
24.4 mi · 31 min · State Route 18
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12
Continue on Snoqualmie Parkway
656 ft · 8 sec · Snoqualmie Parkway
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13
Take the exit slight right toward I 90 East: Spokane
3019 ft · 1 min
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14
Merge slight left
125.5 mi · 2 hr 17 min
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15
Take the exit slight right toward WA 283 North: Ephrata, Soap Lake
2490 ft · 1 min
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16
Continue on Burke Spur
689 ft · 10 sec · Burke Spur
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17
Turn right
20 mi · 27 min
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18
Turn right onto 5th Avenue Southwest
120 m · 14 sec · 5th Avenue Southwest
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19
Turn left onto Alder Street Southwest
2032 ft · 56 sec · Alder Street Southwest
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20
Continue on Alder Street Northwest
1.6 mi · 3 min · Alder Street Northwest
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21
Turn right
3.7 mi · 5 min
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22
Turn left
21.3 mi · 29 min
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23
At the end of the road, turn right onto Coulee Corridor / Sunset Highway
4.3 mi · 6 min · Coulee Corridor / Sunset Highway
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24
Continue on Coulee Boulevard
25.1 mi · 33 min · Coulee Boulevard
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25
Continue on Grand Coulee Avenue
2795 ft · 57 sec · Grand Coulee Avenue
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26
Continue on Midway Avenue
2708 ft · 1 min · Midway Avenue
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27
Continue on Coulee Corridor
1.7 mi · 4 min · Coulee Corridor
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28
Continue on State Route 155
893 ft · 26 sec · State Route 155
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29
Continue on Columbia Avenue
1169 ft · 36 sec · Columbia Avenue
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30
Turn right onto State Highway 155
1290 ft · 22 sec · State Highway 155
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31
Continue on Roosevelt Way
848 ft · 23 sec · Roosevelt Way
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32
Arrive at your destination
0 m · 1 sec · Marina Way
Car Route Details
A richer read on the saved driving route between Federal Way and Coulee Dam.
Highway-focused drive
Most of the mileage stays on named highways, so the important moments are ramps, exits, merges, and the final local approach.
I 90 East
Merge slight left
126 mi · 02h 17m
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 Federal Way and Sunny near Coulee Dam.
Trip Questions
Direct answers travelers usually want before committing to the drive.
How long does it take to drive from Federal Way to Coulee Dam?
The road trip is about 235.5 miles (379 km) and usually takes 04h 52m 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?
Kittitas is a useful midpoint, sitting about 117.6 miles from Federal Way and 117.9 miles from Coulee Dam.
How much longer is the road route than the straight-line distance?
The direct path is about 161.6 miles (260 km), while the road route adds roughly 73.9 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 7:16 AM PDT.
How much will gas cost for this route?
Using about 28.3 MPG, regular gas is estimated at $43.49 one way or $86.97 round trip. Estimated CO2 is about 73.9 kg one way.
What should you check before leaving?
Before you leave, expect Mostly Sunny around Federal Way and Sunny near Coulee Dam.
Stop Ideas Near Kittitas
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 Kittitas.
Columbia Station
Quincy, Washington
Leavenworth, Washington
Leavenworth
Flight Path Map
This map shows the direct air route between Federal Way and Coulee Dam. Straight-line distance: 161.53 mi (259.96 km).
#1 Federal Way
A city in King County, Washington.
| Population | 96,307 |
| Coordinates | 47.3223200, -122.3126200 |
| Altitude | 141 |
| Country | United States |
#2 Coulee Dam
Town in Washington, USA
| Population | 1,083 |
| Coordinates | 47.9654300, -118.9761300 |
| Altitude | 349 |
| Country | United States |
End: Coulee Dam (-118.97613, 47.96543)
Estimated Travel Time
Distance: 379 km by road
| Speed | Time |
|---|---|
| 30 mph (48.3 km/h) | 07h 50m |
| 40 mph (64.37 km/h) | 05h 53m |
| 50 mph (80.47 km/h) | 04h 42m |
| 60 mph (96.56 km/h) | 03h 55m |
| 70 mph (112.65 km/h) | 03h 21m |
| 80 mph (129 km/h) | 02h 56m |
Fuel, Round Trip and CO2
Estimated fuel cost and emissions for this route.
| Fuel | $/gal | One way | Round trip |
|---|---|---|---|
| Regular gas | $5.23 | $43.49 | $86.97 |
| Mid-grade | $5.57 | $46.26 | $92.52 |
| Premium | $5.77 | $47.96 | $95.91 |
| Diesel | $5.47 | $45.43 | $90.86 |
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 · Apr 18, 2026
Distance to Other Cities
Planning a road trip? See the full trip guide on Trip.ovh — stops, fuel costs, weather, and departure timing.