How far is Thornton, CO from Castle Pines, CO?
The driving distance from Thornton, CO to Castle Pines, CO is about 35.6 miles (57.3 km), with a travel time of about 00h 49m by car.
- The straight-line flight distance is about 28.6 miles (46 km).
- For a round trip, plan for roughly 01h 38m 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 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.
City in Colorado
Route Weather Snapshot
Check the forecast at both ends before you head out.
Mostly Sunny then Slight Chance Rain Showers
Mostly Sunny then Slight Chance Rain Showers
Driving Route Map
The map below follows the saved road route between Thornton and Castle Pines.
Turn-by-Turn Driving Directions
Step-by-step road directions between Thornton and Castle Pines.
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1
Start on the route
23 m · 12 sec
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2
Turn left onto Dorothy Boulevard
1165 ft · 59 sec · Dorothy Boulevard
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3
At the end of the road, turn left onto Thornton Parkway
1.6 km · 2 min · Thornton Parkway
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4
Turn left onto I 25 South: Colorado Springs
1973 ft · 40 sec
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5
Merge slight left onto North Valley Highway
1.2 mi · 2 min · North Valley Highway
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6
Keep slight right to continue on North Valley Highway
31 mi · 38 min · North Valley Highway
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7
Take the exit slight right toward Happy Canyon Road
1582 ft · 41 sec
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8
Turn right onto East Happy Canyon Road
134 m · 9 sec · East Happy Canyon Road
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9
Enter the roundabout and take exit 1 toward Lagae Road
4 m · 1 sec · Lagae Road
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10
Exit the roundabout onto Lagae Road
1834 ft · 57 sec · Lagae Road
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11
Turn left onto Chase Lane
1.2 km · 3 min · Chase Lane
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12
Continue on Lagae Road
1173 ft · 52 sec · Lagae Road
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13
At the end of the road, turn right onto Country Club Drive
762 ft · 34 sec · Country Club Drive
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14
Arrive at your destination
0 m · 1 sec · Country Club Parkway
Car Route Details
A richer read on the saved driving route between Thornton and Castle Pines.
Highway-focused drive
Most of the mileage stays on named highways, so the important moments are ramps, exits, merges, and the final local approach.
North Valley Highway
Keep slight right to continue on North Valley Highway
31 mi · 00h 38m
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 then Slight Chance Rain Showers leaving Thornton and Mostly Sunny then Slight Chance Rain Showers near Castle Pines.
Trip Questions
Direct answers travelers usually want before committing to the drive.
How long does it take to drive from Thornton to Castle Pines?
The road trip is about 35.6 miles (57.3 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?
Glendale is a useful midpoint, sitting about 17.8 miles from Thornton and 17.8 miles from Castle Pines.
How much longer is the road route than the straight-line distance?
The direct path is about 28.6 miles (46 km), while the road route adds roughly 7 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 4:52 PM MDT.
How much will gas cost for this route?
Using about 28.3 MPG, regular gas is estimated at $4.62 one way or $9.25 round trip. Estimated CO2 is about 11.1 kg one way.
What should you check before leaving?
Before you leave, expect Mostly Sunny then Slight Chance Rain Showers around Thornton and Mostly Sunny then Slight Chance Rain Showers near Castle Pines.
Stop Ideas Near Glendale
Useful break, food, and waypoint ideas within about 15 miles of the route midpoint.
Fairplay Park
Denver City Council
Town Hall Arts Center
Municipal Court Park
Transit and Meeting Points
Useful pickup, handoff, or rendezvous points close to Glendale.
Denver (Bus Station), Colorado
Union Station
Pine Junction, CO
Boulder, Colorado
Flight Path Map
This map shows the direct air route between Thornton and Castle Pines. Straight-line distance: 28.61 mi (46.05 km).
#1 Thornton
The seventh most populous city in Colorado.
| Population | 148,113 |
| Coordinates | 39.8680400, -104.9719200 |
| Altitude | 1631 |
| Country | United States |
#2 Castle Pines
City in Douglas County, Colorado, United States of America
| Population | 11,664 |
| Coordinates | 39.4580400, -104.8960900 |
| Altitude | 1999 |
| Country | United States |
End: Castle Pines (-104.89609, 39.45804)
Estimated Travel Time
Distance: 57 km by road
| Speed | Time |
|---|---|
| 30 mph (48.3 km/h) | 01h 11m |
| 40 mph (64.37 km/h) | 00h 53m |
| 50 mph (80.47 km/h) | 00h 42m |
| 60 mph (96.56 km/h) | 00h 35m |
| 70 mph (112.65 km/h) | 00h 30m |
| 80 mph (129 km/h) | 00h 26m |
Fuel, Round Trip and CO2
Estimated fuel cost and emissions for this route.
| Fuel | $/gal | One way | Round trip |
|---|---|---|---|
| Regular gas | $3.70 | $4.62 | $9.25 |
| Mid-grade | $4.08 | $5.10 | $10.21 |
| Premium | $4.39 | $5.49 | $10.98 |
| Diesel | $4.74 | $5.92 | $11.84 |
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 23, 2026
Distance to Other Cities
Planning a road trip? See the full trip guide on Trip.ovh — stops, fuel costs, weather, and departure timing.