How far is Castle Rock, WA from Federal Way, WA?
The driving distance from Castle Rock, WA to Federal Way, WA is about 96.1 miles (154.7 km), with a travel time of about 01h 43m by car.
- The straight-line flight distance is about 77.6 miles (124.9 km).
- For a round trip, plan for roughly 03h 27m 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 01h 43m.
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.
City in Thurston County, Washington, United States
Route Weather Snapshot
Check the forecast at both ends before you head out.
Mostly Sunny
Partly Sunny
Driving Route Map
The map below follows the saved road route between Castle Rock and Federal Way.
Turn-by-Turn Driving Directions
Step-by-step road directions between Castle Rock and Federal Way.
-
1
Start on Front Avenue Southwest
1174 ft · 33 sec · Front Avenue Southwest
-
2
Turn right onto Barr Street
45 m · 9 sec · Barr Street
-
3
Turn left onto Huntington Avenue North
2742 ft · 1 min · Huntington Avenue North
-
4
Continue on Mount Saint Helens Way Northeast
124 m · 13 sec · Mount Saint Helens Way Northeast
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5
Take the ramp left toward I 5 North
2204 ft · 54 sec
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6
Merge slight left
83.1 mi · 1 hr 36 min
-
7
Keep slight right
10 mi · 13 min
-
8
Take the exit slight right toward Federal Way, South 320th Street
1774 ft · 51 sec
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9
Turn left onto South 320th Street
1.3 km · 2 min · South 320th Street
-
10
Turn right onto Pacific Highway South
2617 ft · 55 sec · Pacific Highway South
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11
Turn right onto South 312th Street
48 m · 6 sec · South 312th Street
-
12
Turn right
7 m · 2 sec
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13
Arrive at your destination
0 m · 1 sec
Car Route Details
A richer read on the saved driving route between Castle Rock 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 North
Merge slight left
83.1 mi · 01h 36m
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 Sunny leaving Castle Rock and Partly Sunny near Federal Way.
Trip Questions
Direct answers travelers usually want before committing to the drive.
How long does it take to drive from Castle Rock to Federal Way?
The road trip is about 96.1 miles (154.7 km) and usually takes 01h 43m 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?
Tumwater is a useful midpoint, sitting about 48 miles from Castle Rock and 48.1 miles from Federal Way.
How much longer is the road route than the straight-line distance?
The direct path is about 77.6 miles (124.9 km), while the road route adds roughly 18.5 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 3:02 PM PDT.
How much will gas cost for this route?
Using about 28.3 MPG, regular gas is estimated at $17.74 one way or $35.48 round trip. Estimated CO2 is about 30.1 kg one way.
What should you check before leaving?
Before you leave, expect Mostly Sunny around Castle Rock and Partly Sunny near Federal Way.
Stop Ideas Near Tumwater
Useful break, food, and waypoint ideas within about 15 miles of the route midpoint.
City of Lacey - City Hall Parking
Olympia City Hall
Lacey Community Center
Transit and Meeting Points
Useful pickup, handoff, or rendezvous points close to Tumwater.
Centennial Station
Centralia station
Tacoma Dome Station
Tukwila station
Flight Path Map
This map shows the direct air route between Castle Rock and Federal Way. Straight-line distance: 77.63 mi (124.94 km).
#1 Castle Rock
City in Cowlitz County, Washington, United States
| Population | 2,304 |
| Coordinates | 46.2751100, -122.9076100 |
| Altitude | 18 |
| 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: 155 km by road
| Speed | Time |
|---|---|
| 30 mph (48.3 km/h) | 03h 12m |
| 40 mph (64.37 km/h) | 02h 24m |
| 50 mph (80.47 km/h) | 01h 55m |
| 60 mph (96.56 km/h) | 01h 36m |
| 70 mph (112.65 km/h) | 01h 22m |
| 80 mph (129 km/h) | 01h 11m |
Fuel, Round Trip and CO2
Estimated fuel cost and emissions for this route.
| Fuel | $/gal | One way | Round trip |
|---|---|---|---|
| Regular gas | $5.23 | $17.74 | $35.48 |
| Mid-grade | $5.57 | $18.87 | $37.74 |
| Premium | $5.77 | $19.56 | $39.13 |
| Diesel | $5.47 | $18.53 | $37.07 |
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 25, 2026
Distance to Other Cities
Planning a road trip? See the full trip guide on Trip.ovh — stops, fuel costs, weather, and departure timing.