How far is Broomfield, CO from Castlewood, CO?
The driving distance from Broomfield, CO to Castlewood, CO is about 31.3 miles (50.4 km), with a travel time of about 00h 44m by car.
- The straight-line flight distance is about 25.2 miles (40.6 km).
- For a round trip, plan for roughly 01h 28m 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 44m.
This is a short drive, so your comfort window is wide. Traffic and current weather matter more than the clock.
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.
The twentieth most populous city in the United States and the center of the Denver metropolitan area.
Route Weather Snapshot
Check the forecast at both ends before you head out.
Sunny
Driving Route Map
The map below follows the saved road route between Broomfield and Castlewood.
Turn-by-Turn Driving Directions
Step-by-step road directions between Broomfield and Castlewood.
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1
Start on the route
58 m · 16 sec
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2
At the end of the road, turn right onto West 3rd Avenue
83 m · 20 sec · West 3rd Avenue
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3
Turn left onto Nickel Street
798 ft · 26 sec · Nickel Street
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4
Turn right
43 m · 3 sec
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5
Keep slight left to continue on CO 121 South
1525 ft · 45 sec
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6
Turn straight
2276 ft · 1 min
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7
Turn left onto US 36 East: Denver
1737 ft · 44 sec
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8
Merge slight left onto Denver–Boulder Turnpike
1.2 mi · 1 min · Denver–Boulder Turnpike
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9
Keep slight right to continue on Denver–Boulder Turnpike
1.9 mi · 2 min · Denver–Boulder Turnpike
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10
Keep slight right to continue on Denver–Boulder Turnpike
2.5 mi · 3 min · Denver–Boulder Turnpike
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11
Keep slight right to continue on Denver–Boulder Turnpike
2 mi · 2 min · Denver–Boulder Turnpike
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12
Keep slight right to continue on Denver–Boulder Turnpike
1.1 mi · 1 min · Denver–Boulder Turnpike
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13
Take the exit slight right toward I 25 south: Denver
2497 ft · 47 sec
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14
Continue on I 25 south: Denver
2037 ft · 34 sec
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15
Merge slight left onto North Valley Highway
18.8 mi · 24 min · North Valley Highway
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16
Take the exit slight right toward CO 88: Arapahoe Road
1289 ft · 29 sec
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17
Turn right onto East Arapahoe Road
2024 ft · 46 sec · East Arapahoe Road
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18
Turn left onto South Uinta Street
1.1 km · 2 min · South Uinta Street
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19
At the end of the road, turn right onto South Tamarac Court
593 ft · 28 sec · South Tamarac Court
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20
Turn right onto East Fremont Avenue
1294 ft · 57 sec · East Fremont Avenue
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21
Arrive at your destination
0 m · 1 sec · East Fremont Drive
Car Route Details
A richer read on the saved driving route between Broomfield and Castlewood.
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.
North Valley Highway
Merge slight left onto North Valley Highway
18.8 mi · 00h 24m
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.
Sunny leaving Broomfield and Sunny near Castlewood.
Trip Questions
Direct answers travelers usually want before committing to the drive.
How long does it take to drive from Broomfield to Castlewood?
The road trip is about 31.3 miles (50.4 km) and usually takes 00h 44m 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?
Denver is a useful midpoint, sitting about 15.7 miles from Broomfield and 15.7 miles from Castlewood.
How much longer is the road route than the straight-line distance?
The direct path is about 25.2 miles (40.6 km), while the road route adds roughly 6.1 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 7:00 AM to 7:00 PM MDT. If you want a more comfortable same-day return, try to leave by 7:02 PM MDT.
How much will gas cost for this route?
Using about 28.3 MPG, regular gas is estimated at $4.07 one way or $8.14 round trip. Estimated CO2 is about 9.8 kg one way.
What should you check before leaving?
Before you leave, expect Sunny around Broomfield and Sunny near Castlewood.
Stop Ideas Near Denver
Useful break, food, and waypoint ideas within about 15 miles of the route midpoint.
Fairplay Park
Denver City Council
Town Hall Arts Center
Municipal Court Park
Transit and Meeting Points
Useful pickup, handoff, or rendezvous points close to Denver.
Denver (Bus Station), Colorado
Union Station
Boulder, Colorado
Pine Junction, CO
Flight Path Map
This map shows the direct air route between Broomfield and Castlewood. Straight-line distance: 25.21 mi (40.57 km).
#1 Broomfield
A city in Broomfield County, Colorado.
| Population | 72,236 |
| Coordinates | 39.9205400, -105.0866500 |
| Altitude | 1644 |
| Country | United States |
#2 Castlewood
City in Hamlin County, South Dakota, United States
| Population | 25,271 |
| Coordinates | 39.5847100, -104.9010900 |
| Altitude | 1746 |
| Country | United States |
End: Castlewood (-104.90109, 39.58471)
Estimated Travel Time
Distance: 50 km by road
| Speed | Time |
|---|---|
| 30 mph (48.3 km/h) | 01h 02m |
| 40 mph (64.37 km/h) | 00h 46m |
| 50 mph (80.47 km/h) | 00h 37m |
| 60 mph (96.56 km/h) | 00h 31m |
| 70 mph (112.65 km/h) | 00h 26m |
| 80 mph (129 km/h) | 00h 23m |
Fuel, Round Trip and CO2
Estimated fuel cost and emissions for this route.
| Fuel | $/gal | One way | Round trip |
|---|---|---|---|
| Regular gas | $3.70 | $4.07 | $8.14 |
| Mid-grade | $4.08 | $4.49 | $8.98 |
| Premium | $4.39 | $4.83 | $9.66 |
| Diesel | $4.74 | $5.21 | $10.42 |
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 19, 2026
Distance to Other Cities
Planning a road trip? See the full trip guide on Trip.ovh — stops, fuel costs, weather, and departure timing.