How far is Longmont, CO from Castle Pines, CO?
The driving distance from Longmont, CO to Castle Pines, CO is about 61.5 miles (99 km), with a travel time of about 01h 18m by car.
- The straight-line flight distance is about 50.2 miles (80.8 km).
- For a round trip, plan for roughly 02h 36m 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 01h 18m.
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 Freeborn County, Minnesota, United States of America
Route Weather Snapshot
Check the forecast at both ends before you head out.
Rain And Snow
Rain And Snow
Driving Route Map
The map below follows the saved road route between Longmont and Castle Pines.
Turn-by-Turn Driving Directions
Step-by-step road directions between Longmont and Castle Pines.
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1
Start on the route
19 m · 7 sec
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2
Turn right onto 5th Avenue
1025 ft · 47 sec · 5th Avenue
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3
Turn right onto Collyer Street
1255 ft · 42 sec · Collyer Street
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4
Turn left onto 3rd Avenue
1.8 mi · 3 min · 3rd Avenue
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5
Turn left onto East Ken Pratt Boulevard
1.6 mi · 2 min · East Ken Pratt Boulevard
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6
Continue on Highway 119
3 mi · 4 min · Highway 119
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7
Take the exit right toward I 25 South
2690 ft · 1 min · West I 25 Frontage Road
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8
Merge slight left onto Dwight D. Eisenhower Highway
11.9 mi · 12 min · Dwight D. Eisenhower Highway
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9
Continue on North Valley Highway
3187 ft · 36 sec · North Valley Highway
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10
Keep slight right to continue on North Valley Highway
8.8 mi · 11 min · North Valley Highway
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11
Keep slight right to continue on North Valley Highway
31 mi · 38 min · North Valley Highway
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12
Take the exit slight right toward Happy Canyon Road
1582 ft · 41 sec
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13
Turn right onto East Happy Canyon Road
134 m · 9 sec · East Happy Canyon Road
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14
Enter the roundabout and take exit 1 toward Lagae Road
4 m · 1 sec · Lagae Road
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15
Exit the roundabout onto Lagae Road
1834 ft · 57 sec · Lagae Road
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16
Turn left onto Chase Lane
1.2 km · 3 min · Chase Lane
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17
Continue on Lagae Road
1173 ft · 52 sec · Lagae Road
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18
At the end of the road, turn right onto Country Club Drive
762 ft · 34 sec · Country Club Drive
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19
Arrive at your destination
0 m · 1 sec · Country Club Parkway
Car Route Details
A richer read on the saved driving route between Longmont 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.
Rain And Snow leaving Longmont and Rain And Snow near Castle Pines.
Trip Questions
Direct answers travelers usually want before committing to the drive.
How long does it take to drive from Longmont to Castle Pines?
The road trip is about 61.5 miles (99 km) and usually takes 01h 18m 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?
Twin Lakes is a useful midpoint, sitting about 30.8 miles from Longmont and 30.8 miles from Castle Pines.
How much longer is the road route than the straight-line distance?
The direct path is about 50.2 miles (80.8 km), while the road route adds roughly 11.3 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 3:54 PM MDT.
How much will gas cost for this route?
Using about 28.3 MPG, regular gas is estimated at $8.02 one way or $16.05 round trip. Estimated CO2 is about 19.3 kg one way.
What should you check before leaving?
Before you leave, expect Rain And Snow around Longmont and Rain And Snow near Castle Pines.
Stop Ideas Near Twin Lakes
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 Twin Lakes.
Denver (Bus Station), Colorado
Union Station
Boulder, Colorado
Longmont, Colorado
Flight Path Map
This map shows the direct air route between Longmont and Castle Pines. Straight-line distance: 50.2 mi (80.79 km).
#1 Longmont
The most populous city in Boulder County, Colorado.
| Population | 98,445 |
| Coordinates | 40.1672100, -105.1019300 |
| Altitude | 1519 |
| 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: 99 km by road
| Speed | Time |
|---|---|
| 30 mph (48.3 km/h) | 02h 02m |
| 40 mph (64.37 km/h) | 01h 32m |
| 50 mph (80.47 km/h) | 01h 13m |
| 60 mph (96.56 km/h) | 01h 01m |
| 70 mph (112.65 km/h) | 00h 52m |
| 80 mph (129 km/h) | 00h 46m |
Fuel, Round Trip and CO2
Estimated fuel cost and emissions for this route.
| Fuel | $/gal | One way | Round trip |
|---|---|---|---|
| Regular gas | $3.70 | $8.02 | $16.05 |
| Mid-grade | $4.08 | $8.86 | $17.72 |
| Premium | $4.39 | $9.53 | $19.06 |
| Diesel | $4.74 | $10.28 | $20.56 |
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 18, 2026
Distance to Other Cities
Planning a road trip? See the full trip guide on Trip.ovh — stops, fuel costs, weather, and departure timing.