How far is Castle Rock, CO from Southglenn, CO?
The driving distance from Castle Rock, CO to Southglenn, CO is about 19.6 miles (31.5 km), with a travel time of about 00h 28m by car.
- The straight-line flight distance is about 15.7 miles (25.3 km).
- For a round trip, plan for roughly 00h 57m of driving time before adding stops, traffic, or weather delays.
- A comfortable departure window is usually 7:00 AM to 7:00 PM MDT.
Reverse, save, or send this route
This is an easy same-day return drive. Copy the route link, send it to another device, or print a clean version before you head out.
This is an easy same-day return drive.
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 28m.
This is a short drive, so your comfort window is wide. Traffic and current weather matter more than the clock.
This departure sits inside the recommended comfort window for the route.
Halfway Point
A useful midpoint for breaks, coffee, or meeting in the middle.
Route Weather Snapshot
Check the forecast at both ends before you head out.
Chance Showers And Thunderstorms
Mostly Sunny then Chance Showers And Thunderstorms
Driving Route Map
The map below follows the saved road route between Castle Rock and Southglenn.
Turn-by-Turn Driving Directions
Step-by-step road directions between Castle Rock and Southglenn.
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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
13.6 mi · 14 min
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7
Take the exit slight right toward Dry Creek Road
1717 ft · 36 sec
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8
Turn left onto East Dry Creek Road
3.5 mi · 7 min · East Dry Creek Road
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9
Turn right onto South Colorado Boulevard
1191 ft · 29 sec · South Colorado Boulevard
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10
Turn left onto East Geddes Avenue
552 ft · 26 sec · East Geddes Avenue
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11
At the end of the road, turn right onto East Geddes Avenue
1143 ft · 55 sec · East Geddes Avenue
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12
Turn left onto East Geddes Drive
1075 ft · 52 sec · East Geddes Drive
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13
At the end of the road, turn left onto East Fremont Drive
1196 ft · 55 sec · East Fremont Drive
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14
Turn right onto South Fillmore Circle
97 m · 17 sec · South Fillmore Circle
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15
Continue on South Fillmore Circle
36 m · 5 sec · South Fillmore Circle
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16
Arrive at your destination
0 m · 1 sec · South Fillmore Circle
Car Route Details
A richer read on the saved driving route between Castle Rock and Southglenn.
Turn-heavy local drive
The route has frequent decision points for its length, so lane choice and turn timing will matter more than cruising speed.
I 25 North
Merge slight left
13.6 mi · 00h 14m
Route Summary
A quick read on whether this route feels easy, ambitious, or worth planning around.
A short regional drive
This route is short enough to handle as a quick errand, commute, or easy same-day return without much planning overhead.
Chance Showers And Thunderstorms leaving Castle Rock and Mostly Sunny then Chance Showers And Thunderstorms near Southglenn.
Trip Questions
Direct answers travelers usually want before committing to the drive.
How long does it take to drive from Castle Rock to Southglenn?
The road trip is about 19.6 miles (31.5 km) and usually takes 00h 28m in normal driving conditions.
Is this a same-day trip or an overnight route?
This route is short enough to handle as a quick errand, commute, or easy same-day return without much planning overhead.
What is the halfway point on this route?
Carriage Club is a useful midpoint, sitting about 9.8 miles from Castle Rock and 9.8 miles from Southglenn.
How much longer is the road route than the straight-line distance?
The direct path is about 15.7 miles (25.3 km), while the road route adds roughly 3.9 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 7:00 AM to 7:00 PM MDT. If you want a more comfortable same-day return, try to leave by 7:32 PM MDT.
How much will gas cost for this route?
Using about 28.3 MPG, regular gas is estimated at $2.55 one way or $5.10 round trip. Estimated CO2 is about 6.1 kg one way.
What should you check before leaving?
Before you leave, expect Chance Showers And Thunderstorms around Castle Rock and Mostly Sunny then Chance Showers And Thunderstorms near Southglenn.
Stop Ideas Near Carriage Club
Useful break, food, and waypoint ideas within about 15 miles of the route midpoint.
City of Littleton
Aurora City Water Resources
Aurora Municipal Center
Town Hall Arts Center
Transit and Meeting Points
Useful pickup, handoff, or rendezvous points close to Carriage Club.
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 Southglenn. Straight-line distance: 15.73 mi (25.31 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 Southglenn
Neighborhood in Centennial, Colorado, United States
| Population | 42,268 |
| Coordinates | 39.5872100, -104.9527600 |
| Altitude | 1705 |
| Country | United States |
End: Southglenn (-104.95276, 39.58721)
Estimated Travel Time
Distance: 31 km by road
| Speed | Time |
|---|---|
| 30 mph (48.3 km/h) | 00h 39m |
| 40 mph (64.37 km/h) | 00h 29m |
| 50 mph (80.47 km/h) | 00h 23m |
| 60 mph (96.56 km/h) | 00h 19m |
| 70 mph (112.65 km/h) | 00h 16m |
| 80 mph (129 km/h) | 00h 14m |
Fuel, Round Trip and CO2
Estimated fuel cost and emissions for this route.
| Fuel | $/gal | One way | Round trip |
|---|---|---|---|
| Regular gas | $3.70 | $2.55 | $5.10 |
| Mid-grade | $4.08 | $2.82 | $5.64 |
| Premium | $4.39 | $3.03 | $6.06 |
| Diesel | $4.74 | $3.27 | $6.54 |
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 · Jun 03, 2026
Distance to Other Cities
Planning a road trip? See the full trip guide on Trip.ovh — stops, fuel costs, weather, and departure timing.