How far is Martha Lake, WA from Federal Way, WA?
The driving distance from Martha Lake, WA to Federal Way, WA is about 42.5 miles (68.4 km), with a travel time of about 00h 49m by car.
- The straight-line flight distance is about 36.7 miles (59 km).
- For a round trip, plan for roughly 01h 39m 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 49m.
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.
The eighteenth most populous city in the United States and the center of the Seattle metropolitan area.
Route Weather Snapshot
Check the forecast at both ends before you head out.
Sunny
Mostly Sunny
Driving Route Map
The map below follows the saved road route between Martha Lake and Federal Way.
Turn-by-Turn Driving Directions
Step-by-step road directions between Martha Lake and Federal Way.
-
1
Start on Pitner Drive
130 m · 24 sec · Pitner Drive
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2
Turn left onto East Shore Drive
109 m · 15 sec · East Shore Drive
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3
Turn left
110 m · 17 sec
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4
Turn right onto 164th Street Southwest
1.4 mi · 3 min · 164th Street Southwest
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5
Turn left onto Alderwood Mall Parkway
1.3 km · 2 min · Alderwood Mall Parkway
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6
Take the ramp left toward I 5 South, I 405 South, WA 525 South
1416 ft · 34 sec
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7
Merge slight right
158 m · 7 sec
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8
Take the exit slight right toward Seattle
1.1 km · 1 min
-
9
Keep slight left to continue on I 5 South: Seattle
150 m · 12 sec
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10
Merge slight left
34.9 mi · 44 min
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11
Take the exit slight right toward South 272nd Street
2018 ft · 55 sec
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12
Turn right onto South 272nd Street
2875 ft · 1 min · South 272nd Street
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13
Turn left onto Pacific Highway South
2.5 mi · 5 min · Pacific Highway South
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14
Turn left onto South 312th Street
64 m · 9 sec · South 312th Street
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15
Turn right
7 m · 2 sec
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16
Arrive at your destination
0 m · 1 sec
Car Route Details
A richer read on the saved driving route between Martha Lake and Federal Way.
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 5 South
Merge slight left
34.9 mi · 00h 44m
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.
Sunny leaving Martha Lake and Mostly Sunny near Federal Way.
Trip Questions
Direct answers travelers usually want before committing to the drive.
How long does it take to drive from Martha Lake to Federal Way?
The road trip is about 42.5 miles (68.4 km) and usually takes 00h 49m 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?
Seattle is a useful midpoint, sitting about 21 miles from Martha Lake and 21.6 miles from Federal Way.
How much longer is the road route than the straight-line distance?
The direct path is about 36.7 miles (59 km), while the road route adds roughly 5.8 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 4:50 PM PDT.
How much will gas cost for this route?
Using about 28.3 MPG, regular gas is estimated at $7.85 one way or $15.70 round trip. Estimated CO2 is about 13.3 kg one way.
What should you check before leaving?
Before you leave, expect Sunny around Martha Lake and Mostly Sunny near Federal Way.
Stop Ideas Near Seattle
Useful break, food, and waypoint ideas within about 15 miles of the route midpoint.
Tukwila Community Center
Renton City Human Services
Renton City Hall
Renton Police Department
Transit and Meeting Points
Useful pickup, handoff, or rendezvous points close to Seattle.
King Street Station
Seattle (Ferry - Pier 69), Washington
Tukwila station
Edmonds station
Flight Path Map
This map shows the direct air route between Martha Lake and Federal Way. Straight-line distance: 36.69 mi (59.04 km).
#1 Martha Lake
Census designated place
| Population | 15,473 |
| Coordinates | 47.8509300, -122.2393000 |
| Altitude | 143 |
| Country | United States |
#2 Federal Way
A city in King County, Washington.
| Population | 96,307 |
| Coordinates | 47.3223200, -122.3126200 |
| Altitude | 141 |
| Country | United States |
End: (-122.312612, 47.32232)
Estimated Travel Time
Distance: 68 km by road
| Speed | Time |
|---|---|
| 30 mph (48.3 km/h) | 01h 25m |
| 40 mph (64.37 km/h) | 01h 03m |
| 50 mph (80.47 km/h) | 00h 51m |
| 60 mph (96.56 km/h) | 00h 42m |
| 70 mph (112.65 km/h) | 00h 36m |
| 80 mph (129 km/h) | 00h 31m |
Fuel, Round Trip and CO2
Estimated fuel cost and emissions for this route.
| Fuel | $/gal | One way | Round trip |
|---|---|---|---|
| Regular gas | $5.23 | $7.85 | $15.70 |
| Mid-grade | $5.57 | $8.35 | $16.70 |
| Premium | $5.77 | $8.66 | $17.31 |
| Diesel | $5.47 | $8.20 | $16.40 |
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 · May 31, 2026
Distance to Other Cities
Planning a road trip? See the full trip guide on Trip.ovh — stops, fuel costs, weather, and departure timing.