How far is Greeley, CO from New Castle, CO?
The driving distance from Greeley, CO to New Castle, CO is about 228.2 miles (367.2 km), with a travel time of about 04h 23m by car.
- The straight-line flight distance is about 160.7 miles (258.7 km).
- For a round trip, plan for roughly 08h 47m of driving time before adding stops, traffic, or weather delays.
- A comfortable departure window is usually 6:00 AM to 8:00 AM MDT.
Reverse, save, or send this route
This drive is better planned with a longer stop or an overnight stay. Copy the route link, send it to another device, or print a clean version before you head out.
This drive is better planned with a longer stop or an overnight stay.
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 04h 23m.
An early departure helps you fit a real stop into the day without turning the return into a late-night drive.
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.
Town in Colorado, USA
Route Weather Snapshot
Check the forecast at both ends before you head out.
Mostly Sunny then Slight Chance Rain Showers
Slight Chance Rain And Snow Showers then Slight Chance Showers And Thunderstorms
Driving Route Map
The map below follows the saved road route between Greeley and New Castle.
Turn-by-Turn Driving Directions
Step-by-step road directions between Greeley and New Castle.
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1
Start on 19th Avenue
80 m · 19 sec · 19th Avenue
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2
Turn left onto 9th Street
602 ft · 17 sec · 9th Street
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3
Turn left onto 21st Avenue
151 m · 29 sec · 21st Avenue
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4
Turn left onto 10th Street
1.1 mi · 2 min · 10th Street
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5
Turn right onto 8th Avenue
1.4 km · 2 min · 8th Avenue
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6
Turn left onto 18th Street
2.7 mi · 4 min · 18th Street
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7
Keep slight left to continue on East 18th Street
825 ft · 13 sec · East 18th Street
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8
Continue on East 18th Street
1.4 km · 1 min · East 18th Street
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9
Turn right onto County Road 49
21.9 mi · 26 min · County Road 49
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10
Take the ramp right toward I 76 West
901 ft · 22 sec
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11
Merge slight left
34.4 mi · 37 min
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12
Merge slight left
164.2 mi · 3 hr 7 min
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13
Take the exit slight right toward New Castle
1387 ft · 38 sec
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14
Turn right onto Castle Valley Boulevard
553 ft · 9 sec · Castle Valley Boulevard
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15
Enter the roundabout and take exit 3 toward Grand Army of the Republic Highway
77 m · 5 sec · Grand Army of the Republic Highway
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16
Exit the roundabout onto Grand Army of the Republic Highway
2769 ft · 53 sec · Grand Army of the Republic Highway
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17
Continue on East Main Street
3200 ft · 1 min · East Main Street
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18
Turn right onto North 6th Street
144 m · 21 sec · North 6th Street
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19
Arrive at your destination
0 m · 1 sec · North 6th Street
Car Route Details
A richer read on the saved driving route between Greeley and New Castle.
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
164 mi · 03h 07m
Route Summary
A quick read on whether this route feels easy, ambitious, or worth planning around.
A longer out-and-back drive
This is still possible in one day, but it becomes a long driving day. Leaving early and planning your stop window matters more here.
Mostly Sunny then Slight Chance Rain Showers leaving Greeley and Slight Chance Rain And Snow Showers then Slight Chance Showers And Thunderstorms near New Castle.
Trip Questions
Direct answers travelers usually want before committing to the drive.
How long does it take to drive from Greeley to New Castle?
The road trip is about 228.2 miles (367.2 km) and usually takes 04h 23m in normal driving conditions.
Is this a same-day trip or an overnight route?
This is still possible in one day, but it becomes a long driving day. Leaving early and planning your stop window matters more here.
What is the halfway point on this route?
Montezuma is a useful midpoint, sitting about 114 miles from Greeley and 114.2 miles from New Castle.
How much longer is the road route than the straight-line distance?
The direct path is about 160.7 miles (258.7 km), while the road route adds roughly 67.5 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 6:00 AM to 8:00 AM MDT. If you want a more comfortable same-day return, try to leave by 8:12 AM MDT.
How much will gas cost for this route?
Using about 28.3 MPG, regular gas is estimated at $29.77 one way or $59.54 round trip. Estimated CO2 is about 71.5 kg one way.
What should you check before leaving?
Before you leave, expect Mostly Sunny then Slight Chance Rain Showers around Greeley and Slight Chance Rain And Snow Showers then Slight Chance Showers And Thunderstorms near New Castle.
Stop Ideas Near Montezuma
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 Montezuma.
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Flight Path Map
This map shows the direct air route between Greeley and New Castle. Straight-line distance: 160.77 mi (258.73 km).
#1 Greeley
The third most populous city in Weld County, Colorado.
| Population | 108,958 |
| Coordinates | 40.4233100, -104.7091300 |
| Altitude | 1425 |
| Country | United States |
#2 New Castle
Colorado
| Population | 4,962 |
| Coordinates | 39.5727600, -107.5364400 |
| Altitude | 1706 |
| Country | United States |
End: New Castle (-107.53644, 39.57276)
Estimated Travel Time
Distance: 367 km by road
| Speed | Time |
|---|---|
| 30 mph (48.3 km/h) | 07h 36m |
| 40 mph (64.37 km/h) | 05h 42m |
| 50 mph (80.47 km/h) | 04h 33m |
| 60 mph (96.56 km/h) | 03h 48m |
| 70 mph (112.65 km/h) | 03h 15m |
| 80 mph (129 km/h) | 02h 50m |
Fuel, Round Trip and CO2
Estimated fuel cost and emissions for this route.
| Fuel | $/gal | One way | Round trip |
|---|---|---|---|
| Regular gas | $3.70 | $29.77 | $59.54 |
| Mid-grade | $4.08 | $32.88 | $65.75 |
| Premium | $4.39 | $35.35 | $70.70 |
| Diesel | $4.74 | $38.13 | $76.27 |
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.