How far is Seattle, WA from Black Diamond, WA?
The driving distance from Seattle, WA to Black Diamond, WA is about 30.6 miles (49.3 km), with a travel time of about 00h 51m by car.
- The straight-line flight distance is about 25.7 miles (41.3 km).
- For a round trip, plan for roughly 01h 43m of driving time before adding stops, traffic, or weather delays.
- A comfortable departure window is usually 8:00 AM to 10:00 AM PDT.
Reverse, save, or send this route
This route works well as a day trip with time at the destination. Copy the route link, send it to another device, or print a clean version before you head out.
This route works well as a day trip with time at the destination.
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 00h 51m.
A morning start gives you useful time at the destination and keeps the return out of the late evening.
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.
Census designated place
Route Weather Snapshot
Check the forecast at both ends before you head out.
Slight Chance Light Rain then Mostly Cloudy
Driving Route Map
The map below follows the saved road route between Seattle and Black Diamond.
Turn-by-Turn Driving Directions
Step-by-step road directions between Seattle and Black Diamond.
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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 right to continue on I 5 South: Tacoma, Portland
589 ft · 8 sec
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9
Keep slight left to continue on Airport Way
93 m · 4 sec
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10
Keep slight left to continue on I 5 South: Sea-Tac Airport
6.9 mi · 9 min
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11
Take the exit slight right toward WA 900 East
1096 ft · 23 sec
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12
Turn straight onto Martin Luther King Junior Way South
92 m · 5 sec · Martin Luther King Junior Way South
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13
Continue on Martin Luther King Junior Way South
1.9 mi · 3 min · Martin Luther King Junior Way South
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14
Continue on Southwest Sunset Boulevard
1.4 mi · 3 min · Southwest Sunset Boulevard
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15
Continue on South 3rd Street
1.1 km · 2 min · South 3rd Street
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16
Turn left onto Mill Avenue South
773 ft · 16 sec · Mill Avenue South
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17
Turn right onto Bronson Way South
1747 ft · 40 sec · Bronson Way South
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18
Continue on Maple Valley Highway
68 m · 5 sec · Maple Valley Highway
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19
Continue on Maple Valley Highway
3.9 mi · 7 min · Maple Valley Highway
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20
Continue on Southeast Renton Maple Valley Road
1.6 mi · 2 min · Southeast Renton Maple Valley Road
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21
Continue on Renton Maple Valley Road Southeast
5.5 mi · 9 min · Renton Maple Valley Road Southeast
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22
Continue on Maple Valley Black Diamond Road Southeast
1.8 mi · 3 min · Maple Valley Black Diamond Road Southeast
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23
Enter the roundabout and take exit 2 toward Maple Valley Black Diamond Road Southeast
30 m · 2 sec · Maple Valley Black Diamond Road Southeast
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24
Exit the roundabout onto Maple Valley Black Diamond Road Southeast
2184 ft · 41 sec · Maple Valley Black Diamond Road Southeast
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25
Enter the roundabout and take exit 2 toward Maple Valley Black Diamond Road Southeast
32 m · 2 sec · Maple Valley Black Diamond Road Southeast
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26
Exit the roundabout onto Maple Valley Black Diamond Road Southeast
1.4 km · 2 min · Maple Valley Black Diamond Road Southeast
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27
Enter the roundabout and take exit 1 toward Maple Valley Black Diamond Road Southeast
31 m · 3 sec · Maple Valley Black Diamond Road Southeast
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28
Exit the roundabout onto Maple Valley Black Diamond Road Southeast
2 mi · 3 min · Maple Valley Black Diamond Road Southeast
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29
Continue on 3rd Avenue
1.1 km · 2 min · 3rd Avenue
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30
Enter the roundabout and take exit 3 toward 3rd Avenue
56 m · 4 sec · 3rd Avenue
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31
Exit the roundabout onto 3rd Avenue
1190 ft · 28 sec · 3rd Avenue
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32
Enter the roundabout and take exit 2 toward 3rd Avenue
33 m · 2 sec · 3rd Avenue
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33
Exit the roundabout onto 3rd Avenue
2946 ft · 1 min · 3rd Avenue
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34
Turn left onto Lawson Street
18 m · 2 sec · Lawson Street
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35
Arrive at your destination
0 m · 1 sec · Lawson Street
Car Route Details
A richer read on the saved driving route between Seattle and Black Diamond.
Turn-heavy local drive
The route has frequent decision points for its length, so lane choice and turn timing will matter more than cruising speed.
I 5 South
Keep slight left to continue on I 5 South: Sea-Tac Airport
6.92 mi · 00h 09m
Route Summary
A quick read on whether this route feels easy, ambitious, or worth planning around.
A comfortable day-trip route
This route works well as a day trip. You can leave in the morning, spend meaningful time at the destination, and still return the same day.
Mostly Cloudy leaving Seattle and Slight Chance Light Rain then Mostly Cloudy near Black Diamond.
Trip Questions
Direct answers travelers usually want before committing to the drive.
How long does it take to drive from Seattle to Black Diamond?
The road trip is about 30.6 miles (49.3 km) and usually takes 00h 51m in normal driving conditions.
Is this a same-day trip or an overnight route?
This route works well as a day trip. You can leave in the morning, spend meaningful time at the destination, and still return the same day.
What is the halfway point on this route?
East Renton Highlands is a useful midpoint, sitting about 15.3 miles from Seattle and 15.3 miles from Black Diamond.
How much longer is the road route than the straight-line distance?
The direct path is about 25.7 miles (41.3 km), while the road route adds roughly 4.9 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 8:00 AM to 10:00 AM PDT. If you want a more comfortable same-day return, try to leave by 4:46 PM PDT.
How much will gas cost for this route?
Using about 28.3 MPG, regular gas is estimated at $5.65 one way or $11.30 round trip. Estimated CO2 is about 9.6 kg one way.
What should you check before leaving?
Before you leave, expect Mostly Cloudy around Seattle and Slight Chance Light Rain then Mostly Cloudy near Black Diamond.
Stop Ideas Near East Renton Highlands
Useful break, food, and waypoint ideas within about 15 miles of the route midpoint.
Tukwila Community Center
Auburn Building Permits
City of Auburn
Auburn Community & Event Center
Transit and Meeting Points
Useful pickup, handoff, or rendezvous points close to East Renton Highlands.
Tukwila station
King Street Station
Seattle (Ferry - Pier 69), Washington
Tacoma Dome Station
Flight Path Map
This map shows the direct air route between Seattle and Black Diamond. Straight-line distance: 25.66 mi (41.3 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 Black Diamond
City in King County, Washington, United States
| Population | 5,403 |
| Coordinates | 47.3087100, -122.0031700 |
| Altitude | 199 |
| Country | United States |
End: Black Diamond (-122.00317, 47.30871)
Estimated Travel Time
Distance: 49 km by road
| Speed | Time |
|---|---|
| 30 mph (48.3 km/h) | 01h 01m |
| 40 mph (64.37 km/h) | 00h 45m |
| 50 mph (80.47 km/h) | 00h 36m |
| 60 mph (96.56 km/h) | 00h 30m |
| 70 mph (112.65 km/h) | 00h 26m |
| 80 mph (129 km/h) | 00h 22m |
Fuel, Round Trip and CO2
Estimated fuel cost and emissions for this route.
| Fuel | $/gal | One way | Round trip |
|---|---|---|---|
| Regular gas | $5.23 | $5.65 | $11.30 |
| Mid-grade | $5.57 | $6.01 | $12.02 |
| Premium | $5.77 | $6.23 | $12.47 |
| Diesel | $5.47 | $5.90 | $11.81 |
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 13, 2026
Distance to Other Cities
Planning a road trip? See the full trip guide on Trip.ovh — stops, fuel costs, weather, and departure timing.