How far is Castle Rock, CO from Westminster, CO?
Fastest route
The distance from Castle Rock, Colorado to Westminster, Colorado is approximately 39.7 miles (about 64 kilometers). The estimated travel time is 45 minutes. The recommended route is via I-25 N and US-36 W.
Directions
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🚗 Get on I-25 N from Wilcox St:
- Head north on Cantril St toward Third St.
- Turn left at the 1st cross street onto Third St.
- At the traffic circle, take the 1st exit onto Perry St.
- Turn right onto Wilcox St.
- Turn right to merge onto I-25 N.
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🛣️ Follow I-25 N to US-287 N/N Federal Blvd in Westminster:
- Continue on I-25 N until you reach the US-287 N/Federal Blvd exit.
- Take the US-287 N/Federal Blvd exit from US-36 W.
-
🚗 Take exit 217A to merge onto US-36 W toward Boulder.
-
🛣️ Exit onto US-287 N/N Federal Blvd:
- Merge onto US-287 N/N Federal Blvd.
-
🚗 Take W 80th Ave and Lowell Blvd to Newton St:
- Use the left 2 lanes to turn left onto W 80th Ave.
- Turn left onto Lowell Blvd.
- Turn right onto W 77th Ave.
- Turn right at the 2nd cross street onto Newton St.
Tips & Suggestions
- 🛣️ Plan your trip ahead of time and check for any potential road closures or traffic updates to avoid delays.
- ⛽ Make sure your vehicle has enough fuel for the journey, especially if it's a longer trip.
- 🗺️ Consider using a GPS navigation system or a map app to help you stay on the right track throughout the journey.
- 🚓 Observe the speed limits and traffic rules to ensure a safe and smooth drive.
- ☕ Take short breaks during the trip to stretch your legs and stay refreshed.
- 🚘 Keep your vehicle in good condition and ensure all necessary maintenance is up to date.
- 📱 Inform someone about your travel plans, especially if it's a long-distance trip, for safety purposes.
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 43m.
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.
City in Colorado, United States
Route Weather Snapshot
Check the forecast at both ends before you head out.
Sunny then Slight Chance Rain Showers
Mostly Sunny then Slight Chance Rain Showers
Driving Route Map
The map below follows the saved road route between Castle Rock and Westminster.
Turn-by-Turn Driving Directions
Step-by-step road directions between Castle Rock and Westminster.
-
1
Start on North Cantril Street
27 m · 8 sec · North Cantril Street
-
2
Turn left onto 3rd Street
641 ft · 23 sec · 3rd Street
-
3
Exit the roundabout onto 3rd Street
135 m · 18 sec · 3rd Street
-
4
Turn right onto North Wilcox Street
2807 ft · 2 min · North Wilcox Street
-
5
Take the ramp straight toward I 25 North
1715 ft · 42 sec
-
6
Merge slight left
34.4 mi · 41 min
-
7
Take the exit slight left toward US 36 West: Westminster, Boulder
2930 ft · 52 sec
-
8
Merge slight right onto Denver–Boulder Turnpike
1.8 mi · 2 min · Denver–Boulder Turnpike
-
9
Take the exit slight right toward US 287: Federal Boulevard
1157 ft · 23 sec
-
10
Keep slight right to continue on US 287 North: Federal Boulevard
1577 ft · 34 sec
-
11
Turn straight onto Federal Boulevard
1417 ft · 40 sec · Federal Boulevard
-
12
Turn left onto West 80th Avenue
2676 ft · 1 min · West 80th Avenue
-
13
Turn left onto Lowell Boulevard
1996 ft · 42 sec · Lowell Boulevard
-
14
Turn right onto West 77th Avenue
873 ft · 42 sec · West 77th Avenue
-
15
Turn right onto Newton Street
35 m · 5 sec · Newton Street
-
16
Arrive at your destination
0 m · 1 sec · Newton Street
Car Route Details
A richer read on the saved driving route between Castle Rock and Westminster.
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
34.4 mi · 00h 41m
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 then Slight Chance Rain Showers leaving Castle Rock and Mostly Sunny then Slight Chance Rain Showers near Westminster.
Trip Questions
Direct answers travelers usually want before committing to the drive.
How long does it take to drive from Castle Rock to Westminster?
The road trip is about 39.8 miles (64 km) and usually takes 00h 43m 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?
Cherry Hills Village is a useful midpoint, sitting about 19.8 miles from Castle Rock and 19.9 miles from Westminster.
How much longer is the road route than the straight-line distance?
The direct path is about 33.5 miles (53.9 km), while the road route adds roughly 6.3 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 $5.18 one way or $10.35 round trip. Estimated CO2 is about 12.4 kg one way.
What should you check before leaving?
Before you leave, expect Sunny then Slight Chance Rain Showers around Castle Rock and Mostly Sunny then Slight Chance Rain Showers near Westminster.
Stop Ideas Near Cherry Hills Village
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 Cherry Hills 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 Westminster. Straight-line distance: 33.5 mi (53.92 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 Westminster
The most populous city in Adams County, Colorado.
| Population | 115,046 |
| Coordinates | 39.8366500, -105.0372000 |
| Altitude | 1641 |
| Country | United States |
End: Newton Street (-105.037386, 39.836648)
Estimated Travel Time
Distance: 64 km by road
| Speed | Time |
|---|---|
| 30 mph (48.3 km/h) | 01h 19m |
| 40 mph (64.37 km/h) | 00h 59m |
| 50 mph (80.47 km/h) | 00h 47m |
| 60 mph (96.56 km/h) | 00h 39m |
| 70 mph (112.65 km/h) | 00h 34m |
| 80 mph (129 km/h) | 00h 29m |
Fuel, Round Trip and CO2
Estimated fuel cost and emissions for this route.
| Fuel | $/gal | One way | Round trip |
|---|---|---|---|
| Regular gas | $3.70 | $5.18 | $10.35 |
| Mid-grade | $4.08 | $5.72 | $11.44 |
| Premium | $4.39 | $6.15 | $12.29 |
| Diesel | $4.74 | $6.63 | $13.26 |
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.