How far is Castle Rock, CO from Erie, CO?
The driving distance from Castle Rock, CO to Erie, CO is about 55.4 miles (89.2 km), with a travel time of about 01h 11m by car.
- The straight-line flight distance is about 48 miles (77.2 km).
- For a round trip, plan for roughly 02h 23m 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 11m.
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.
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.
Driving Route Map
The map below follows the saved road route between Castle Rock and Erie.
Turn-by-Turn Driving Directions
Step-by-step road directions between Castle Rock and Erie.
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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
35.9 mi · 43 min
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7
Keep slight right to continue on North Valley Highway
4.3 mi · 6 min · North Valley Highway
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8
Keep slight right to continue on North Valley Highway
5.3 mi · 6 min · North Valley Highway
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9
Continue on Dwight D. Eisenhower Highway
4.1 mi · 4 min · Dwight D. Eisenhower Highway
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10
Take the exit slight right toward CR 8: Erie Parkway, Summit Boulevard
1522 ft · 31 sec
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11
Turn left onto Erie Parkway
3.7 mi · 7 min · Erie Parkway
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12
Turn right onto Briggs Street
1 km · 2 min · Briggs Street
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13
Turn left onto Wells Street
706 ft · 31 sec · Wells Street
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14
Arrive at your destination
0 m · 1 sec · Wells Street
Car Route Details
A richer read on the saved driving route between Castle Rock and Erie.
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
35.9 mi · 00h 43m
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 Erie.
Trip Questions
Direct answers travelers usually want before committing to the drive.
How long does it take to drive from Castle Rock to Erie?
The road trip is about 55.4 miles (89.2 km) and usually takes 01h 11m 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?
Denver is a useful midpoint, sitting about 27.7 miles from Castle Rock and 27.7 miles from Erie.
How much longer is the road route than the straight-line distance?
The direct path is about 48 miles (77.2 km), while the road route adds roughly 7.4 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 4:06 PM MDT.
How much will gas cost for this route?
Using about 28.3 MPG, regular gas is estimated at $7.21 one way or $14.42 round trip. Estimated CO2 is about 17.3 kg one way.
What should you check before leaving?
Before you leave, expect Sunny around Castle Rock and Sunny near Erie.
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 Castle Rock and Erie. Straight-line distance: 47.97 mi (77.2 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 Erie
Town in Boulder County, Colorado, USA
| Population | 30,318 |
| Coordinates | 40.0502600, -105.0499800 |
| Altitude | 1532 |
| Country | United States |
End: Erie (-105.04998, 40.05026)
Estimated Travel Time
Distance: 89 km by road
| Speed | Time |
|---|---|
| 30 mph (48.3 km/h) | 01h 50m |
| 40 mph (64.37 km/h) | 01h 23m |
| 50 mph (80.47 km/h) | 01h 06m |
| 60 mph (96.56 km/h) | 00h 55m |
| 70 mph (112.65 km/h) | 00h 47m |
| 80 mph (129 km/h) | 00h 41m |
Fuel, Round Trip and CO2
Estimated fuel cost and emissions for this route.
| Fuel | $/gal | One way | Round trip |
|---|---|---|---|
| Regular gas | $3.70 | $7.21 | $14.42 |
| Mid-grade | $4.08 | $7.96 | $15.93 |
| Premium | $4.39 | $8.56 | $17.12 |
| Diesel | $4.74 | $9.24 | $18.47 |
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.