How far is Sterling, CO from Castle Rock, CO?
The driving distance from Sterling, CO to Castle Rock, CO is about 157.8 miles (253.9 km), with a travel time of about 02h 15m by car.
- The straight-line flight distance is about 122.9 miles (197.8 km).
- For a round trip, plan for roughly 04h 30m of driving time before adding stops, traffic, or weather delays.
- A comfortable departure window is usually 8:00 AM to 10:00 AM MDT.
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 15m.
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 Weld County, Colorado, United States of America
Route Weather Snapshot
Check the forecast at both ends before you head out.
Sunny
Driving Route Map
The map below follows the saved road route between Sterling and Castle Rock.
Turn-by-Turn Driving Directions
Step-by-step road directions between Sterling and Castle Rock.
-
1
Start on the route
73 m · 23 sec
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2
Turn left onto North 3rd Street
84 m · 11 sec · North 3rd Street
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3
Turn right onto East Chestnut Street
1.4 mi · 3 min · East Chestnut Street
-
4
Continue on US Highway 6
1246 ft · 24 sec · US Highway 6
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5
Take the ramp slight right toward I 76 West
1715 ft · 43 sec
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6
Merge slight left
105.8 mi · 1 hr 46 min
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7
Take the exit slight right toward E470 Toll South: Limon
1.6 km · 2 min
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8
Merge slight left onto E-470
35.1 mi · 35 min · E-470
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9
Take the exit slight right toward I 25: Denver, Colorado Springs
1106 ft · 27 sec
-
10
Keep slight left to continue on I 25 South: Colorado Springs
1.2 km · 1 min
-
11
Merge slight left
11.7 mi · 12 min
-
12
Take the exit slight right toward Wilcox Street, Wolfensberger Road
1213 ft · 32 sec
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13
Turn left onto East Wolfensberger Road
132 m · 21 sec · East Wolfensberger Road
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14
Continue on North Wilcox Street
2093 ft · 1 min · North Wilcox Street
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15
Turn left onto 5th Street
979 ft · 37 sec · 5th Street
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16
Turn right onto North Cantril Street
837 ft · 29 sec · North Cantril Street
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17
Arrive at your destination
0 m · 1 sec · North Cantril Street
Car Route Details
A richer read on the saved driving route between Sterling 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 76 West
Merge slight left
106 mi · 01h 46m
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 Sterling and Sunny near Castle Rock.
Trip Questions
Direct answers travelers usually want before committing to the drive.
How long does it take to drive from Sterling to Castle Rock?
The road trip is about 157.8 miles (253.9 km) and usually takes 02h 15m 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?
Keenesburg is a useful midpoint, sitting about 78.9 miles from Sterling and 79 miles from Castle Rock.
How much longer is the road route than the straight-line distance?
The direct path is about 122.9 miles (197.8 km), while the road route adds roughly 34.9 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 MDT. If you want a more comfortable same-day return, try to leave by 2:00 PM MDT.
How much will gas cost for this route?
Using about 28.3 MPG, regular gas is estimated at $20.60 one way or $41.20 round trip. Estimated CO2 is about 49.5 kg one way.
What should you check before leaving?
Before you leave, expect Sunny around Sterling and Sunny near Castle Rock.
Stop Ideas Near Keenesburg
Useful break, food, and waypoint ideas within about 15 miles of the route midpoint.
Transit and Meeting Points
Useful pickup, handoff, or rendezvous points close to Keenesburg.
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Flight Path Map
This map shows the direct air route between Sterling and Castle Rock. Straight-line distance: 122.93 mi (197.83 km).
#1 Sterling
City in Colorado
| Population | 14,078 |
| Coordinates | 40.6255400, -103.2077100 |
| Altitude | 1200 |
| Country | United States |
#2 Castle Rock
The most populous city in Douglas County, Colorado.
| Population | 70,567 |
| Coordinates | 39.3722100, -104.8560900 |
| Altitude | 1897 |
| Country | United States |
End: Cantril Street (-104.856315, 39.3722)
Estimated Travel Time
Distance: 254 km by road
| Speed | Time |
|---|---|
| 30 mph (48.3 km/h) | 05h 15m |
| 40 mph (64.37 km/h) | 03h 56m |
| 50 mph (80.47 km/h) | 03h 09m |
| 60 mph (96.56 km/h) | 02h 37m |
| 70 mph (112.65 km/h) | 02h 15m |
| 80 mph (129 km/h) | 01h 58m |
Fuel, Round Trip and CO2
Estimated fuel cost and emissions for this route.
| Fuel | $/gal | One way | Round trip |
|---|---|---|---|
| Regular gas | $3.70 | $20.60 | $41.20 |
| Mid-grade | $4.08 | $22.75 | $45.50 |
| Premium | $4.39 | $24.46 | $48.92 |
| Diesel | $4.74 | $26.39 | $52.77 |
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 Colorado · Apr 19, 2026
Distance to Other Cities
Planning a road trip? See the full trip guide on Trip.ovh — stops, fuel costs, weather, and departure timing.