How far is Greeley, CO from Castle Rock, CO?
The driving distance from Greeley, CO to Castle Rock, CO is about 90.7 miles (145.9 km), with a travel time of about 01h 35m by car.
- The straight-line flight distance is about 73 miles (117.5 km).
- For a round trip, plan for roughly 03h 10m 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 35m.
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.
A city in Adams County, Colorado.
Route Weather Snapshot
Check the forecast at both ends before you head out.
Mostly Sunny
Sunny
Driving Route Map
The map below follows the saved road route between Greeley and Castle Rock.
Turn-by-Turn Driving Directions
Step-by-step road directions between Greeley and Castle Rock.
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1
Start on 19th Avenue
615 ft · 29 sec · 19th Avenue
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2
Turn right onto 8th Street
2087 ft · 2 min · 8th Street
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3
Turn right onto 14th Avenue
1.2 km · 2 min · 14th Avenue
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4
Turn left onto 16th Street
3.3 mi · 7 min · 16th Street
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5
At the end of the road, turn right onto Fern Avenue
1414 ft · 45 sec · Fern Avenue
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6
Turn left onto East 18th Street
1.4 km · 1 min · East 18th Street
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7
Turn right onto Weld County Parkway
21.9 mi · 26 min · Weld County Parkway
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8
Take the ramp right toward I 76 West
901 ft · 22 sec
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9
Merge slight left onto Heartland Expressway
15.8 mi · 16 min · Heartland Expressway
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10
Take the exit slight right toward E470 Toll South: Limon
1.6 km · 2 min
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11
Merge slight left onto E-470
35.1 mi · 35 min · E-470
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12
Take the exit slight right toward I 25: Denver, Colorado Springs
1106 ft · 27 sec
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13
Keep slight left to continue on I 25 South: Colorado Springs
1.2 km · 1 min
-
14
Merge slight left
11.7 mi · 12 min
-
15
Take the exit slight right toward Wilcox Street, Wolfensberger Road
1213 ft · 32 sec
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16
Turn left onto East Wolfensberger Road
132 m · 21 sec · East Wolfensberger Road
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17
Continue on North Wilcox Street
2093 ft · 1 min · North Wilcox Street
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18
Turn left onto 5th Street
979 ft · 37 sec · 5th Street
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19
Turn right onto North Cantril Street
837 ft · 29 sec · North Cantril Street
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20
Arrive at your destination
0 m · 1 sec · North Cantril Street
Car Route Details
A richer read on the saved driving route between Greeley 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.
E-470
Merge slight left onto E-470
35.1 mi · 00h 35m
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 leaving Greeley 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 Greeley to Castle Rock?
The road trip is about 90.7 miles (145.9 km) and usually takes 01h 35m 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?
Brighton is a useful midpoint, sitting about 46.7 miles from Greeley and 44 miles from Castle Rock.
How much longer is the road route than the straight-line distance?
The direct path is about 73 miles (117.5 km), while the road route adds roughly 17.7 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 3:20 PM MDT.
How much will gas cost for this route?
Using about 28.3 MPG, regular gas is estimated at $11.83 one way or $23.67 round trip. Estimated CO2 is about 28.4 kg one way.
What should you check before leaving?
Before you leave, expect Mostly Sunny around Greeley and Sunny near Castle Rock.
Stop Ideas Near Brighton
Useful break, food, and waypoint ideas within about 15 miles of the route midpoint.
Fairplay Park
Aurora Municipal Center
Town Hall
Municipal Court Park
Transit and Meeting Points
Useful pickup, handoff, or rendezvous points close to Brighton.
Denver (Bus Station), Colorado
Union Station
Longmont, Colorado
Boulder, Colorado
Flight Path Map
This map shows the direct air route between Greeley and Castle Rock. Straight-line distance: 73.04 mi (117.55 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 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: 146 km by road
| Speed | Time |
|---|---|
| 30 mph (48.3 km/h) | 03h 01m |
| 40 mph (64.37 km/h) | 02h 15m |
| 50 mph (80.47 km/h) | 01h 48m |
| 60 mph (96.56 km/h) | 01h 30m |
| 70 mph (112.65 km/h) | 01h 17m |
| 80 mph (129 km/h) | 01h 07m |
Fuel, Round Trip and CO2
Estimated fuel cost and emissions for this route.
| Fuel | $/gal | One way | Round trip |
|---|---|---|---|
| Regular gas | $3.70 | $11.83 | $23.67 |
| Mid-grade | $4.08 | $13.07 | $26.14 |
| Premium | $4.39 | $14.05 | $28.10 |
| Diesel | $4.74 | $15.16 | $30.32 |
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.