How far is Castle Rock, CO from Welby, CO?
The driving distance from Castle Rock, CO to Welby, CO is about 37.7 miles (60.6 km), with a travel time of about 00h 48m by car.
- The straight-line flight distance is about 32.6 miles (52.4 km).
- For a round trip, plan for roughly 01h 37m 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 48m.
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.
Driving Route Map
The map below follows the saved road route between Castle Rock and Welby.
Turn-by-Turn Driving Directions
Step-by-step road directions between Castle Rock and Welby.
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1
Start on North Cantril Street
27 m · 8 sec · North Cantril Street
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2
Turn left onto 3rd Street
641 ft · 23 sec · 3rd Street
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3
Exit the roundabout onto 3rd Street
135 m · 18 sec · 3rd Street
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4
Turn right onto North Wilcox Street
2807 ft · 2 min · North Wilcox Street
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5
Take the ramp straight toward I 25 North
1715 ft · 42 sec
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6
Merge slight left
33.8 mi · 40 min
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7
Take the exit slight right toward I 76: Grand Junction, Fort Morgan, 70th Avenue
611 ft · 8 sec
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8
Keep slight left to continue on I 76 West, CO 224: Grand Junction
1845 ft · 25 sec
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9
Keep slight left to continue on CO 224: 70th Avenue
54 m · 4 sec
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10
Continue on CO 224: 70th Avenue
1170 ft · 28 sec
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11
Turn right onto East 70th Avenue
1.3 mi · 2 min · East 70th Avenue
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12
Turn left onto North York Street
1 km · 2 min · North York Street
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13
Continue on North York Street
567 ft · 22 sec · North York Street
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14
Arrive at your destination
0 m · 1 sec · North York Street
Car Route Details
A richer read on the saved driving route between Castle Rock and Welby.
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 25 North
Merge slight left
33.8 mi · 00h 40m
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.
Sunny leaving Castle Rock and Sunny near Welby.
Trip Questions
Direct answers travelers usually want before committing to the drive.
How long does it take to drive from Castle Rock to Welby?
The road trip is about 37.7 miles (60.6 km) and usually takes 00h 48m 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?
Greenwood Village is a useful midpoint, sitting about 18.8 miles from Castle Rock and 18.8 miles from Welby.
How much longer is the road route than the straight-line distance?
The direct path is about 32.6 miles (52.4 km), while the road route adds roughly 5.1 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 $4.92 one way or $9.84 round trip. Estimated CO2 is about 11.8 kg one way.
What should you check before leaving?
Before you leave, expect Sunny around Castle Rock and Sunny near Welby.
Stop Ideas Near Greenwood Village
Useful break, food, and waypoint ideas within about 15 miles of the route midpoint.
Fairplay Park
Denver City Council
Town Hall Arts Center
City of Littleton
Transit and Meeting Points
Useful pickup, handoff, or rendezvous points close to Greenwood Village.
Denver (Bus Station), Colorado
Union Station
Pine Junction, CO
Boulder, Colorado
Flight Path Map
This map shows the direct air route between Castle Rock and Welby. Straight-line distance: 32.55 mi (52.39 km).
#1 Castle Rock
The most populous city in Douglas County, Colorado.
| Population | 70,567 |
| Coordinates | 39.3722100, -104.8560900 |
| Altitude | 1897 |
| Country | United States |
#2 Welby
Census-designated place in Colorado
| Population | 14,846 |
| Coordinates | 39.8366500, -104.9591500 |
| Altitude | 1565 |
| Country | United States |
End: Welby (-104.95915, 39.83665)
Estimated Travel Time
Distance: 61 km by road
| Speed | Time |
|---|---|
| 30 mph (48.3 km/h) | 01h 15m |
| 40 mph (64.37 km/h) | 00h 56m |
| 50 mph (80.47 km/h) | 00h 45m |
| 60 mph (96.56 km/h) | 00h 37m |
| 70 mph (112.65 km/h) | 00h 32m |
| 80 mph (129 km/h) | 00h 28m |
Fuel, Round Trip and CO2
Estimated fuel cost and emissions for this route.
| Fuel | $/gal | One way | Round trip |
|---|---|---|---|
| Regular gas | $3.70 | $4.92 | $9.84 |
| Mid-grade | $4.08 | $5.43 | $10.86 |
| Premium | $4.39 | $5.84 | $11.68 |
| Diesel | $4.74 | $6.30 | $12.60 |
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 · May 13, 2026
Distance to Other Cities
Planning a road trip? See the full trip guide on Trip.ovh — stops, fuel costs, weather, and departure timing.