How far is Castle Rock, CO from Cortez, CO?
The driving distance from Castle Rock, CO to Cortez, CO is about 397.9 miles (640.3 km), with a travel time of about 08h 22m by car.
- The straight-line flight distance is about 245.7 miles (395.4 km).
- For a round trip, plan for roughly 16h 44m of driving time before adding stops, traffic, or weather delays.
- A comfortable departure window is usually 6:00 AM to 7:30 AM MDT.
Reverse, save, or send this route
This drive is better planned with a longer stop or an overnight stay. Copy the route link, send it to another device, or print a clean version before you head out.
This drive is better planned with a longer stop or an overnight stay.
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 08h 22m.
Starting early still helps, but most travelers will want a longer stop or an overnight stay on a route this long.
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, USA
Route Weather Snapshot
Check the forecast at both ends before you head out.
Mostly Sunny
Driving Route Map
The map below follows the saved road route between Castle Rock and Cortez.
Turn-by-Turn Driving Directions
Step-by-step road directions between Castle Rock and Cortez.
-
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 · 21 sec · 3rd Street
-
4
Turn left onto North Wilcox Street
1119 ft · 38 sec · North Wilcox Street
-
5
Enter the roundabout and take exit 2 toward South Wilcox Street
12 m · 1 sec · South Wilcox Street
-
6
Exit the roundabout onto South Wilcox Street
1432 ft · 53 sec · South Wilcox Street
-
7
Turn right onto West Plum Creek Parkway
981 ft · 35 sec · West Plum Creek Parkway
-
8
Turn left onto Frontage Road
860 ft · 29 sec · Frontage Road
-
9
Take the ramp left toward I 25 South
1440 ft · 37 sec
-
10
Merge slight left
32.4 mi · 33 min
-
11
Continue on Monument Valley Freeway
8.8 mi · 10 min · Monument Valley Freeway
-
12
Continue on Ronald Reagan Highway
915 ft · 12 sec · Ronald Reagan Highway
-
13
Keep slight left to continue on Ronald Reagan Highway
22.7 mi · 23 min · Ronald Reagan Highway
-
14
Continue on John F. Kennedy Memorial Highway
12.9 mi · 13 min · John F. Kennedy Memorial Highway
-
15
Continue on North Freeway
2.6 mi · 3 min · North Freeway
-
16
Take the exit slight right toward 29th Street
2351 ft · 33 sec
-
17
Merge slight left onto North Freeway
1 mi · 1 min · North Freeway
-
18
Take the exit slight right toward 13th Street
792 ft · 12 sec
-
19
Continue straight
1189 ft · 18 sec
-
20
Merge slight left onto North Freeway
6.1 mi · 8 min · North Freeway
-
21
Continue on John F. Kennedy Memorial Highway
40.5 mi · 41 min · John F. Kennedy Memorial Highway
-
22
Take the exit slight right toward South I 25 Business, US 160 West: Walsenburg, Alamosa
2.8 mi · 5 min
-
23
Turn right onto West 7th Street
71.4 mi · 1 hr 27 min · West 7th Street
-
24
Continue on Broadway Avenue
1420 ft · 39 sec · Broadway Avenue
-
25
Continue on Denver Avenue
159 m · 18 sec · Denver Avenue
-
26
Turn right onto Fourth Street
1.1 km · 2 min · Fourth Street
-
27
Turn left onto West Avenue
123 m · 15 sec · West Avenue
-
28
Turn right onto Main Street
16.6 mi · 28 min · Main Street
-
29
Continue on Park Avenue
1343 ft · 46 sec · Park Avenue
-
30
Continue on 1st Avenue
1.3 km · 2 min · 1st Avenue
-
31
Continue on West U.S. Highway 160
12.6 mi · 15 min · West U.S. Highway 160
-
32
Continue on Grand Avenue
1.1 mi · 3 min · Grand Avenue
-
33
Continue on West U.S. Highway 160
57.8 mi · 1 hr 21 min · West U.S. Highway 160
-
34
Continue on San Juan Street
2.6 mi · 5 min · San Juan Street
-
35
Continue on US 160
10.5 mi · 14 min · US 160
-
36
Continue straight
46.1 mi · 1 hr
-
37
Take the exit slight left
588 ft · 25 sec
-
38
At the end of the road, turn left
44.9 mi · 1 hr 1 min
-
39
Turn right onto North Market Street
59 m · 11 sec · North Market Street
-
40
Turn left
65 m · 16 sec
-
41
Arrive at your destination
0 m · 1 sec
Car Route Details
A richer read on the saved driving route between Castle Rock and Cortez.
Long-distance drive
This route is long enough that fuel, rest stops, weather, and timing matter more than any single maneuver.
West 7th Street
Turn right onto West 7th Street
71.4 mi · 01h 27m
Route Summary
A quick read on whether this route feels easy, ambitious, or worth planning around.
Better with a longer stop
This route is long enough that most travelers will be better off planning an overnight stay or a more deliberate stop window.
Sunny leaving Castle Rock and Mostly Sunny near Cortez.
Trip Questions
Direct answers travelers usually want before committing to the drive.
How long does it take to drive from Castle Rock to Cortez?
The road trip is about 397.9 miles (640.3 km) and usually takes 08h 22m in normal driving conditions.
Is this a same-day trip or an overnight route?
This route is long enough that most travelers will be better off planning an overnight stay or a more deliberate stop window.
What is the halfway point on this route?
Alamosa is a useful midpoint, sitting about 198.9 miles from Castle Rock and 199 miles from Cortez.
How much longer is the road route than the straight-line distance?
The direct path is about 245.7 miles (395.4 km), while the road route adds roughly 152.2 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 6:00 AM to 7:30 AM MDT. Starting early still helps, but most travelers will want a longer stop or an overnight stay on a route this long.
How much will gas cost for this route?
Using about 28.3 MPG, regular gas is estimated at $51.92 one way or $103.84 round trip. Estimated CO2 is about 124.8 kg one way.
What should you check before leaving?
Before you leave, expect Sunny around Castle Rock and Mostly Sunny near Cortez.
Stop Ideas Near Alamosa
Useful break, food, and waypoint ideas within about 15 miles of the route midpoint.
Transit and Meeting Points
Useful pickup, handoff, or rendezvous points close to Alamosa.
Alamosa, CO
Poncha Springs, CO
Salida, CO
Flight Path Map
This map shows the direct air route between Castle Rock and Cortez. Straight-line distance: 245.68 mi (395.39 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 Cortez
Town in and county seat of Montezuma County, Colorado, United States
| Population | 8,734 |
| Coordinates | 37.3488800, -108.5859300 |
| Altitude | 1887 |
| Country | United States |
End: Cortez (-108.58593, 37.34888)
Estimated Travel Time
Distance: 640 km by road
| Speed | Time |
|---|---|
| 30 mph (48.3 km/h) | 13h 15m |
| 40 mph (64.37 km/h) | 09h 56m |
| 50 mph (80.47 km/h) | 07h 57m |
| 60 mph (96.56 km/h) | 06h 37m |
| 70 mph (112.65 km/h) | 05h 41m |
| 80 mph (129 km/h) | 04h 57m |
Fuel, Round Trip and CO2
Estimated fuel cost and emissions for this route.
| Fuel | $/gal | One way | Round trip |
|---|---|---|---|
| Regular gas | $3.70 | $51.92 | $103.84 |
| Mid-grade | $4.08 | $57.34 | $114.68 |
| Premium | $4.39 | $61.65 | $123.30 |
| Diesel | $4.74 | $66.51 | $133.01 |
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.