How far is Renton, WA from Castle Rock, WA?
The driving distance from Renton, WA to Castle Rock, WA is about 109.1 miles (175.6 km), with a travel time of about 02h 12m by car.
- The straight-line flight distance is about 89.6 miles (144.2 km).
- For a round trip, plan for roughly 04h 24m 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 02h 12m.
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
Driving Route Map
The map below follows the saved road route between Renton and Castle Rock.
Turn-by-Turn Driving Directions
Step-by-step road directions between Renton and Castle Rock.
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1
Start on the route
19 m · 5 sec
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2
Turn left
22 m · 8 sec
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3
Turn left
30 m · 13 sec
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4
Turn left onto Rainier Avenue South
1.5 km · 2 min · Rainier Avenue South
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5
Continue on Valley Freeway
99 m · 7 sec · Valley Freeway
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6
Take the exit slight right toward I 405 South: Burien, Seattle, Tacoma
2264 ft · 48 sec
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7
Merge slight left
2 mi · 3 min
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8
Take the exit slight right toward I 5 South: Portland
1446 ft · 49 sec
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9
Merge slight left
20.3 mi · 25 min
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10
Keep slight right
84 mi · 1 hr 37 min
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11
Take the exit slight right toward WA 504: Castle Rock
2013 ft · 52 sec
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12
Turn right onto Huntington Avenue North
1894 ft · 1 min · Huntington Avenue North
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13
Turn slight right onto Front Avenue Northwest
578 ft · 16 sec · Front Avenue Northwest
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14
Continue on Front Avenue Southwest
1174 ft · 33 sec · Front Avenue Southwest
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15
Arrive at your destination
0 m · 1 sec · Front Avenue Southwest
Car Route Details
A richer read on the saved driving route between Renton and Castle Rock.
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
Keep slight right
84 mi · 01h 37m
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 Renton and Mostly Sunny near Castle Rock.
Trip Questions
Direct answers travelers usually want before committing to the drive.
How long does it take to drive from Renton to Castle Rock?
The road trip is about 109.1 miles (175.6 km) and usually takes 02h 12m 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 54.5 miles from Renton and 54.6 miles from Castle Rock.
How much longer is the road route than the straight-line distance?
The direct path is about 89.6 miles (144.2 km), while the road route adds roughly 19.5 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 2:06 PM PDT.
How much will gas cost for this route?
Using about 28.3 MPG, regular gas is estimated at $20.15 one way or $40.29 round trip. Estimated CO2 is about 34.2 kg one way.
What should you check before leaving?
Before you leave, expect Mostly Sunny around Renton and Mostly Sunny near Castle Rock.
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 Urban Forestry
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 Renton and Castle Rock. Straight-line distance: 89.6 mi (144.19 km).
#1 Renton
The second most populous city in King County, Washington.
| Population | 101,494 |
| Coordinates | 47.4828800, -122.2170700 |
| Altitude | 12 |
| Country | United States |
#2 Castle Rock
City in Cowlitz County, Washington, United States
| Population | 2,304 |
| Coordinates | 46.2751100, -122.9076100 |
| Altitude | 18 |
| Country | United States |
End: Castle Rock (-122.90761, 46.27511)
Estimated Travel Time
Distance: 176 km by road
| Speed | Time |
|---|---|
| 30 mph (48.3 km/h) | 03h 38m |
| 40 mph (64.37 km/h) | 02h 43m |
| 50 mph (80.47 km/h) | 02h 10m |
| 60 mph (96.56 km/h) | 01h 49m |
| 70 mph (112.65 km/h) | 01h 33m |
| 80 mph (129 km/h) | 01h 21m |
Fuel, Round Trip and CO2
Estimated fuel cost and emissions for this route.
| Fuel | $/gal | One way | Round trip |
|---|---|---|---|
| Regular gas | $5.23 | $20.15 | $40.29 |
| Mid-grade | $5.57 | $21.43 | $42.87 |
| Premium | $5.77 | $22.22 | $44.44 |
| Diesel | $5.47 | $21.05 | $42.10 |
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.