Drive Time
51m
Distance
30.6 mi
Drive Score
6/10
Good drive
Same Day?
Yes, doable
Fuel Cost
$6
one way
The drive from Seattle, WA to Black Diamond, WA covers 30.6 miles and takes about 51m behind the wheel. This route is realistic as a one-day drive if you keep your stops efficient.
The route leans on Madison Street, 4th Avenue, Spring Street for much of the mileage, and the overall profile is turn-heavy local drive. At current regular gas prices, budget about $6.30 one way before food or hotel costs.
Trip Pace
Same-day drive is realistic
A same-day return is realistic if you keep stops short.
Break Rhythm
0 planned breaks
A short stop every 2 to 3 hours is enough for this drive.
Midpoint
15.3 miles from Seattle, WA
A natural place for your longest stop of the day , about 25m into the drive .
Expect a 51m drive with frequent turns across 30.6 miles of local and secondary roads.
| Road | Distance | Duration |
|---|---|---|
| Madison Street | Unavailable | Refreshing |
| 4th Avenue | Unavailable | Refreshing |
| Spring Street | Unavailable | Refreshing |
| I 5 South | Unavailable | Refreshing |
| I 90 East | Unavailable | Refreshing |
| Airport Way | Unavailable | Refreshing |
| WA 900 East | Unavailable | Refreshing |
| Martin Luther King Junior Way South | Unavailable | Refreshing |
Per-road distance and duration are being refreshed from OSRM for this route.
Step-by-step road directions between Seattle, WA and Black Diamond, WA.
Start on the route
Turn left onto Madison Street
Turn right onto 4th Avenue
Turn right onto Spring Street
Take the ramp right toward I 5 South: Portland
Continue straight
Keep slight left to continue on I 90 East, I 5 South: Bellevue, Portland
Keep slight right to continue on I 5 South: Tacoma, Portland
Keep slight left to continue on Airport Way
Keep slight left to continue on I 5 South: Sea-Tac Airport
Take the exit slight right toward WA 900 East
Turn straight onto Martin Luther King Junior Way South
Continue on Martin Luther King Junior Way South
Continue on Southwest Sunset Boulevard
Continue on South 3rd Street
Turn left onto Mill Avenue South
Turn right onto Bronson Way South
Continue on Maple Valley Highway
Continue on Maple Valley Highway
Continue on Southeast Renton Maple Valley Road
Continue on Renton Maple Valley Road Southeast
Continue on Maple Valley Black Diamond Road Southeast
Enter the roundabout and take exit 2 toward Maple Valley Black Diamond Road Southeast
Exit the roundabout onto Maple Valley Black Diamond Road Southeast
Enter the roundabout and take exit 2 toward Maple Valley Black Diamond Road Southeast
Exit the roundabout onto Maple Valley Black Diamond Road Southeast
Enter the roundabout and take exit 1 toward Maple Valley Black Diamond Road Southeast
Exit the roundabout onto Maple Valley Black Diamond Road Southeast
Continue on 3rd Avenue
Enter the roundabout and take exit 3 toward 3rd Avenue
Exit the roundabout onto 3rd Avenue
Enter the roundabout and take exit 2 toward 3rd Avenue
Exit the roundabout onto 3rd Avenue
Turn left onto Lawson Street
Arrive at your destination
Morning Departure
Leave by 9 AM and you'll arrive before lunch.
Evening Departure
Even a 4 PM departure gets you there before dark in summer.
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 30.6 miles or 51m in
Use this first pause for coffee, a restroom break, and a quick traffic check ahead.
Halfway reset
Around 15.3 miles or 25m in
This is the best place for your longest stop, a real meal, and a full fuel check.
Final approach
Final hour starts around 43m
Traffic, exits, and arrival timing usually matter more near Black Diamond, WA than in the middle of the route.
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 30.6 miles and 51m.
Rest stops, refuel points, and overnight suggestions along this route.
Halfway Point
Midpoint
About 15.3 mi from Seattle, WA · 25m into the drive
Mid-route town
Meal stop
15 mi into the route
Best for: Lunch, fuel, and a longer reset
This sits close to the middle of the route, so it works well for the longest stop of the day.
A short stop after about 30.6 miles helps settle the day before fatigue starts building.
The midpoint is around 15.3 miles from Seattle, WA, which is a good place for a longer meal and fuel stop.
The final approach into Black Diamond, WA usually feels slower than the middle of the drive, so avoid planning your tightest schedule at the very end.
Try to arrive with enough fuel left to skip an immediate station stop unless you already know the area around Black Diamond, WA.
These stop ideas are pacing suggestions — the exact town or exit can change with traffic, hotel plans, and fuel range.
Regular Gas
$6.30 one way
$12.61 round trip
| Fuel Type | $/gal | One Way | Round Trip |
|---|---|---|---|
| midgrade | $5.57 | $6.71 | $13.41 |
| premium | $5.77 | $6.95 | $13.90 |
| diesel | $5.47 | $6.59 | $13.17 |
No toll roads detected on this route.
Estimated Trip Cost (one way, 1 person)
Fuel
$6
Meals
$25–$50
Total
$31–$56
Rough estimate based on US averages. Hotel $80–$140/night, meals $25–$50/day.
Estimated CO2 emission: 10.7 kg one way.
Driving Electric?
About $3 in charging · 0 stops · 64% less CO2
| Vehicle Type | kWh | Stops | DC Fast | Home Charge |
|---|---|---|---|---|
| Average EV | 9.2 | 0 | $3.21 | $1.47 |
| Efficient EV | 7.7 | 0 | $2.68 | $1.22 |
| EV Truck/SUV | 12.2 | 0 | $4.28 | $1.96 |
Gas CO2
11 kg
EV CO2
4 kg (64% less)
This trip is well within single-charge range for most EVs. No charging stops needed if you start fully charged.
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. If you're planning ahead, check the forecast closer to your travel date.
Origin
Late night in Seattle on Saturday
Local time
4:32 AM
PDT
Current temp
41°F
Forecast unavailable right now
Destination
Late night in Black Diamond on Saturday
Local time
4:32 AM
PDT
Current temp
37°F
Forecast unavailable right now
Along the Route
40°F
Renton, WA
15 mi in
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
Origin and destination are on the same clock, so arrival timing is easier to judge at a glance.
Temperature spread
A meaningful temperature swing is a good cue to rethink layers, water, and how soon you want to arrive.
Road read
Use the two city cards together: check the sky where you start, then compare it with the local time and temperature at arrival.
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