Coulee Dam, WA to Tacoma, WA is 244 miles and takes about 5 hours 2 minutes via I 90 and State Route 18, with a fuel budget near $51 and enough daylight to finish in a day. This highway-focused drive will take you from the Pacific Coast region to the Pacific Coast region, entirely within Washington state. It's a straightforward trip that's perfect for a single day of driving, offering a practical way to get from point A to point B without many detours. Consider this if you're looking for an efficient journey with minimal fuss.
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
122 miles from Coulee Dam, WA
A natural place for your longest stop of the day
, about 2h 38m into the drive
.
Who Is This Route For?
Weekend Trip
Doable as a same-day drive at 5h 2m. Total distance: 244 miles.
Family Friendly
Moderate complexity with 1 natural rest stops along the way.
Solo Traveler
5h 2m drive, comfortable solo distance.
Drive Character
This is primarily a highway-focused drive, with 67% of the route utilizing major highways like I 90. You'll experience a significant stretch of 125.7 miles on I 90, meaning extended periods of consistent speed and road conditions. While Coulee Boulevard and State Route 18 will offer some variation, the majority of your time will be spent on well-maintained, high-speed roads. Expect a driving experience that prioritizes efficiency over winding scenic byways.
Most of the miles stay on highways, which makes pacing and fuel planning easier than turn-by-turn city driving.
There are about 37 navigation steps in the underlying route data, so the final approach matters more than the middle miles.
I 90 is the longest continuous segment at about 125.7 miles.
How Hard Is This Drive?
This is a straightforward highway drive that stays mostly on I 90 and State Route 18. This route has several spots where lane changes, forks, or exits need your full attention. The trickiest moment comes around 206.1 miles in.
Driving Effort10/10
High effort - long or complex enough to need steady focus all day
Balances navigation complexity with total wheel time.
This is a demanding drive. With 24 significant decision points across 244 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: at 206.1 miles: Exit ramp - move to the correct lane early. Lane positioning matters here; at 206.3 miles: Highway fork - watch signs carefully. Lane positioning matters here. Multiple destination signs - pick the right one; at 234 miles: Highway fork - watch signs carefully. Lane positioning matters here. Multiple destination signs - pick the right one.
Critical Maneuvers
5 of 24 key points
These are the spots where you need to pay the most attention. Preview them before you drive.
7
206.1 mi into trip|~4h 10m in
Take the exit toward WA 18 West: Auburn
Exit ramp - move to the correct lane early. Lane positioning matters here
Use the slight right lane.
Exit 25
Toward WA 18 West: Auburn
9
206.3 mi into trip|~4h 10m in
Keep slight left at fork toward SR 18 west, Snoqualmie Parkway: Auburn, Tacoma
Highway fork - watch signs carefully. Lane positioning matters here. Multiple destination signs - pick the right one
Use the straight / left / right lanes.
Toward SR 18 west, Snoqualmie Parkway: Auburn,...
8
234 mi into trip|~4h 46m in
Keep slight left at fork toward I 5 South, WA 161: Enchanted Parkway South, Tacoma
Highway fork - watch signs carefully. Lane positioning matters here. Multiple destination signs - pick the right one
Use the straight lane.
Toward I 5 South, WA 161: Enchanted Parkway Sou...
8
243 mi into trip|~4h 59m in
Take the exit toward A Street, City Center
Exit ramp - move to the correct lane early. Lane positioning matters here. Multiple destination signs - pick the right one
Use the slight left lane.
Toward A Street, City Center
9
243.2 mi into trip|~4h 59m in
Keep slight left at fork toward South 15 Street, Pacific Avenue
Highway fork - watch signs carefully. Lane positioning matters here. Multiple destination signs - pick the right one
Use the slight left / straight lanes.
Toward South 15 Street, Pacific Avenue
Towns Mentioned on Route Signs
Based on OSRM destination-sign hints, not a full list of every settlement the road passes.
On the drive from Coulee Dam, WA to Tacoma, WA, road signs begin pointing toward Snoqualmie Parkway: Auburn along the way.
Snoqualmie Parkway: Auburn
206.3 mi in|~4h 10m
Main Roads
Road
Distance
Duration
I 90
125.7 mi
2h 17m
State Route 18
26.7 mi
34m
Coulee Boulevard
25.1 mi
32m
Coulee Corridor
23 mi
32m
Basin Street Southwest
19.9 mi
26m
I 5
7.2 mi
9m
Coulee Corridor / Sunset Highway
4.3 mi
6m
WA 28
3.7 mi
5m
Longest stretch:
I 90
— 125.7 mi, about 2h 17m
Turn-by-Turn Driving Directions
Step-by-step road directions between Coulee Dam, WA and Tacoma, WA.
1
Start on Marina Way
93 ft·4 sec·Marina Way
2
Continue on Roosevelt Way
0.1 mi·20 sec·Roosevelt Way
3
Continue on WA 155
0.2 mi·27 sec·State Highway 155
4
Turn left onto WA 155
0.2 mi·33 sec·Columbia Avenue
5
Continue on WA 155
0.2 mi·26 sec·State Route 155
6
Continue on WA 155
1.7 mi·3 min·Coulee Corridor
7
Continue on WA 155
0.5 mi·1 min·Midway Avenue
8
Continue on WA 155
257 ft·7 sec·Midway Avenue
9
Continue on WA 155
0.5 mi·56 sec·Grand Coulee Avenue
10
Continue on WA 155
25 mi·32 min·Coulee Boulevard
11
Continue on US 2
4.3 mi·6 min·Coulee Corridor / Sunset Highway
12
Turn left onto WA 17
21 mi·29 min·Coulee Corridor
13
Turn right onto WA 28
3.7 mi·5 min·WA 28
14
Turn left onto Alder Street Northwest
1.6 mi·2 min·Alder Street Northwest
15
Continue on Alder Street Southwest
0.4 mi·56 sec·Alder Street Southwest
16
Turn right onto 5th Avenue Southwest
392 ft·16 sec·5th Avenue Southwest
17
Turn left onto WA 28
20 mi·26 min·Basin Street Southwest
18
Take the ramp
0.3 mi·44 sec
Toward I 90 West: Seattle
19
Merge onto I 90
126 mi·2 hr 17 min·I 90
Use the straight / slight right lanes.
20
Take the exit
0.2 mi·30 sec
Exit 25Toward WA 18 West: AuburnUse the slight right lane.
21
Keep slight left at fork
448 ft·13 sec
Toward SR 18 west, Snoqualmie Parkway: Auburn, TacomaUse the straight / left / right lanes.
22
Merge onto WA 18
0.3 mi·25 sec·Snoqualmie Parkway
23
Continue on WA 18
27 mi·34 min·State Route 18
Use the straight / slight right lanes.
24
Take the exit
0.6 mi·1 min
Toward I 5: Seattle, TacomaUse the straight / slight right lanes.
25
Keep slight left at fork
0.6 mi·1 min
Toward I 5 South, WA 161: Enchanted Parkway South, TacomaUse the straight lane.
26
Keep slight left at fork
0.2 mi·31 sec
Toward I 5 South: Tacoma
27
Merge onto I 5
7.2 mi·9 min·I 5
Use the straight / slight right lanes.
28
Take the exit
0.1 mi·19 sec
Exit 133Toward WA 7 South, I 705 North: City Center, Tacoma Dome
29
Keep slight right at fork
334 ft·8 sec
Toward I 705 North: City Center, Tacoma Dome Station
30
Keep slight left at fork
0.4 mi·50 sec
Toward I 705 North: City CenterUse the straight / slight right lanes.
31
Merge onto I 705
0.3 mi·22 sec·I 705
Use the straight / slight right lanes.
32
Take the exit
0.3 mi·37 sec
Toward A Street, City CenterUse the slight left lane.
33
Keep slight left at fork
0.2 mi·31 sec
Toward South 15 Street, Pacific AvenueUse the slight left / straight lanes.
34
Continue on South 15th Street
0.3 mi·59 sec·South 15th Street
Use the straight / left / right lanes.
35
Turn right onto Tacoma Avenue South
0.3 mi·49 sec·Tacoma Avenue South
36
Turn right onto South 11th Street
43 ft·1 sec·South 11th Street
37
Arrive at destination
South 11th Street
Trip Plan
With a duration of just over 5 hours, this trip is easily manageable in a single day. Aim to depart Coulee Dam in the morning to maximize daylight and allow for a relaxed arrival in Tacoma. You'll want to plan for one stop, perhaps around the halfway point, to refuel and stretch your legs. Given the longest stretch is over 125 miles, ensure your fuel tank is adequately filled before embarking on the I 90 segment. Keep an eye on traffic as you approach the Tacoma area, as congestion can sometimes impact travel times.
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 122 miles from Coulee Dam, WA, or about 2h 38m into the drive.
The longest continuous stretch on this route runs about 125.7 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 54 miles or 1h 15m in
Use this first pause for coffee, a restroom break, and a quick traffic check ahead.
Halfway reset
Around 122 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 3m
Traffic, exits, and arrival timing usually matter more near Tacoma, WA than in the middle of the route.
Before You Leave
+
Open the route before leaving Coulee Dam, 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 Coulee Dam, WA
This is one driving day of about 244 miles and 5h 2m.
Your first comfortable stop window is around 54 miles from Coulee Dam, 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 I 90 for about 125.7 miles.
Where to Stop
Rest stops, refuel points, and overnight suggestions along this route.
Halfway Point
Midpoint
About 122 mi from Coulee Dam, WA
· 2h 38m into the drive
Place data sourced from public business listings. Hours and availability may vary.
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...
19 mi from route
~49 min detour
Free
near mile 218.8
Park data from the National Park Service API. Alerts update every 2 hours.
Fuel & Cost
Regular Gas
$51.07 one way
$102.13 round trip
$5.32/gal25.4 MPG avg85 kg CO2
Fuel Type
$/gal
One Way
Round Trip
midgrade
$5.58
$53.56
$107.11
premium
$5.77
$55.41
$110.82
diesel
$5.61
$53.87
$107.74
No toll roads detected on this route.
Estimated Trip Cost (one way, 1 person)
Fuel
$51
Meals
$25–$50
Total
$76–$101
Rough estimate based on US averages. Hotel $80–$140/night, meals $25–$50/day.
Estimated CO2 emission: 85.4 kg one way.
Prices: EIA weekly data, 2026-04-13.
EV Charging Along Route
8 DC fast chargers
· Coverage: excellent
Tesla Supercharger
George, Washington
Tesla
1 DCFC
Pilot EV Charging Station
Ellensburg, Washington
Other
1 DCFC
Circle K Electric Vehicle Charging Station
Ellensburg, Washington
Other
1 DCFC
Tesla Supercharger
Ellensburg, Washington
Tesla
1 DCFC
Tesla Supercharger
North Bend, Washington
Tesla
1 DCFC
Electrify America Charging Station
Ellensburg, Washington
Electrify America
1 DCFC
EVCS Charging Station
Snoqualmie Pass, Washington
EVCS
1 DCFC
EVCS Charging Station
Cle Elum, Washington
EVCS
1 DCFC
Tesla: 3
Other: 2
EVCS: 2
Electrify America: 1
Station data from NREL Alternative Fuel Stations database.
Driving Electric?
About $26 in charging
· 0 stops
· 66% less CO2
Vehicle Type
kWh
Stops
DC Fast
Home Charge
Average EV
73.2
0
$25.62
$11.71
Efficient EV
61
0
$21.35
$9.76
EV Truck/SUV
97.6
1
$34.16
$15.62
Gas CO2
85 kg
EV CO2
29 kg (66% less)
Plan for 0 charging stops, roughly every 270 miles. Allow 25-40 minutes per stop at a DC fast charger.
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 Apr 15, 2026
Origin
Coulee Dam, WA
Late night
in Coulee Dam on Saturday
Local time
12:09 AM
PDT
Current temp
51°F
Unavailable
Live forecast
Destination
Tacoma, WA
Late night
in Tacoma on Saturday
Local time
12:09 AM
PDT
Current temp
59°F
Unavailable
Live 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
8 degrees warmer at arrival
A meaningful temperature swing is a good cue to rethink layers, water, and how soon you want to arrive.
Road read
5h 2m 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.
Frequently Asked Questions
The drive from Coulee Dam, WA to Tacoma, WA covers 244 miles and takes about 5h 2m without stops. Add 15-30 minutes for a fuel or rest stop on longer drives.
The main roads are I 90, State Route 18, Coulee Boulevard. Most of the drive stays on highways, so watch for ramps and exits.
This is a comfortable same-day trip.
The midpoint is about 122 miles from Coulee Dam, WA. Look for rest areas, gas stations, or food options near the halfway mark.
At current regular gas prices, expect to spend about $51.07 one way. This estimate uses 25.4 MPG — your actual cost will vary with your vehicle's fuel efficiency and current gas prices.
An early start around 7-8 AM gets you there with plenty of daylight left. A late afternoon start means arriving after dark. Morning is better.
Plan about 1 meaningful break for fuel, food, or rest. Plan on a short reset every 3 to 4 hours to stay fresh behind the wheel.
This is a demanding drive. With 24 significant decision points across 244 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.
The main spots that need attention: at 206.1 miles: Exit ramp - move to the correct lane early. Lane positioning matters here; at 206.3 miles: Highway fork - watch signs carefully. Lane positioning matters here. Multiple destination signs - pick the right one; at 234 miles: Highway fork - watch signs carefully. Lane positioning matters here. Multiple destination signs - pick the right one.
On the drive from Coulee Dam, WA to Tacoma, WA, road signs begin pointing toward Snoqualmie Parkway: Auburn along the way.
How this page is built
Compiled by the Trip.ovh planning team at COD Solutions Oy from open government datasets — OSRM over OpenStreetMap for geometry, EIA for fuel prices, NREL for EV charging, and NPS for national parks. See our methodology for refresh cadence and limitations.
