How far is New Castle, CO from Greeley, CO?
The driving distance from New Castle, CO to Greeley, CO is about 220.7 miles (355.2 km), with a travel time of about 03h 43m by car.
- The straight-line flight distance is about 160.7 miles (258.7 km).
- For a round trip, plan for roughly 07h 26m 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 03h 43m.
An early departure helps you fit a real stop into the day without turning the return into a late-night drive.
This departure sits inside the recommended comfort window for the route.
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.
Slight Chance Rain And Snow Showers then Slight Chance Showers And Thunderstorms
Mostly Sunny then Slight Chance Rain Showers
Driving Route Map
The map below follows the saved road route between New Castle and Greeley.
Turn-by-Turn Driving Directions
Step-by-step road directions between New Castle and Greeley.
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1
Start on North 6th Street
144 m · 26 sec · North 6th Street
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2
Turn left onto West Main Street
3200 ft · 1 min · West Main Street
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3
Continue on Grand Army of the Republic Highway
2784 ft · 53 sec · Grand Army of the Republic Highway
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4
Enter the roundabout and take exit 1 toward Castle Valley Boulevard
4 m · 1 sec · Castle Valley Boulevard
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5
Exit the roundabout onto Castle Valley Boulevard
962 ft · 22 sec · Castle Valley Boulevard
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6
Take the ramp left toward I 70: Denver
1354 ft · 33 sec
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7
Merge slight left
164.2 mi · 3 hr 10 min
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8
Keep slight left to continue on Heartland Expressway
12.6 mi · 15 min · Heartland Expressway
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9
Keep slight right to continue on Heartland Expressway
21.8 mi · 22 min · Heartland Expressway
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10
Take the exit slight right toward Kersey Road
1014 ft · 22 sec
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11
Turn left onto County Road 49
22 mi · 26 min · County Road 49
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12
Turn left onto East 18th Street
3.7 mi · 6 min · East 18th Street
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13
At the end of the road, turn right onto 8th Avenue
1.4 km · 2 min · 8th Avenue
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14
Turn left onto 10th Street
1022 ft · 29 sec · 10th Street
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15
Turn right onto 10th Avenue
153 m · 17 sec · 10th Avenue
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16
Turn left onto 9th Street
1.2 km · 1 min · 9th Street
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17
Turn left onto 19th Avenue
80 m · 12 sec · 19th Avenue
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18
Arrive at your destination
0 m · 1 sec · 19th Avenue
Car Route Details
A richer read on the saved driving route between New Castle and Greeley.
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 70
Merge slight left
164 mi · 03h 10m
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.
Slight Chance Rain And Snow Showers then Slight Chance Showers And Thunderstorms leaving New Castle and Mostly Sunny then Slight Chance Rain Showers near Greeley.
Trip Questions
Direct answers travelers usually want before committing to the drive.
How long does it take to drive from New Castle to Greeley?
The road trip is about 220.7 miles (355.2 km) and usually takes 03h 43m 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 New Castle and 106.8 miles from Greeley.
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 60 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 9:34 AM MDT.
How much will gas cost for this route?
Using about 28.3 MPG, regular gas is estimated at $28.81 one way or $57.61 round trip. Estimated CO2 is about 69.2 kg one way.
What should you check before leaving?
Before you leave, expect Slight Chance Rain And Snow Showers then Slight Chance Showers And Thunderstorms around New Castle and Mostly Sunny then Slight Chance Rain Showers near Greeley.
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 New Castle and Greeley. Straight-line distance: 160.77 mi (258.73 km).
#1 New Castle
Colorado
| Population | 4,962 |
| Coordinates | 39.5727600, -107.5364400 |
| Altitude | 1706 |
| Country | United States |
#2 Greeley
The third most populous city in Weld County, Colorado.
| Population | 108,958 |
| Coordinates | 40.4233100, -104.7091300 |
| Altitude | 1425 |
| Country | United States |
End: 19th Avenue (-104.709131, 40.42331)
Estimated Travel Time
Distance: 355 km by road
| Speed | Time |
|---|---|
| 30 mph (48.3 km/h) | 07h 21m |
| 40 mph (64.37 km/h) | 05h 31m |
| 50 mph (80.47 km/h) | 04h 24m |
| 60 mph (96.56 km/h) | 03h 40m |
| 70 mph (112.65 km/h) | 03h 09m |
| 80 mph (129 km/h) | 02h 45m |
Fuel, Round Trip and CO2
Estimated fuel cost and emissions for this route.
| Fuel | $/gal | One way | Round trip |
|---|---|---|---|
| Regular gas | $3.70 | $28.81 | $57.61 |
| Mid-grade | $4.08 | $31.81 | $63.63 |
| Premium | $4.39 | $34.21 | $68.41 |
| Diesel | $4.74 | $36.90 | $73.80 |
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.