Origin
Castle Rock, CO
Afternoon in Castle Rock on Friday
Local time
12:55 PM
MDT
Current temp
73°F
Unavailable
Live forecast
Trip from Castle Rock, CO to Alamosa, CO
Compiled and reviewed by the Trip.ovh planning team at COD Solutions Oy · Last reviewed Apr 17, 2026 · Editorial standards
Drive Time
3h 51m
Distance
204.3 mi
329 km
Drive Score
9/10
Great drive
Same Day?
Yes, doable
Fuel Cost
$31
one way
EV Charging
Unknown
Best Time to Leave
4 AM
3h 38m
★
6 AM
3h 51m
8 AM
4h 17m
10 AM
4h 0m
12 PM
3h 58m
3 PM
4h 1m
5 PM
4h 16m
8 PM
3h 44m
Estimated drive times based on typical traffic patterns. Actual times may vary with weather, construction, and real-time conditions.
Castle Rock, CO
Wikimedia Commons
Alamosa, CO
RDNE Stock project
Trip Overview
The drive from Castle Rock, CO to Alamosa, CO covers 204.3 miles and takes about 3h 51m behind the wheel. This route is realistic as a one-day drive if you keep your stops efficient.
The route leans on West 7th Street, John F. Kennedy Memorial Highway, I 25 for much of the mileage, and the overall profile is turn-heavy local drive. The longest uninterrupted segment is about 71.4 miles on West 7th Street. At current regular gas prices, budget about $30.78 one way before food or hotel costs.
Trip Pace
Same-day drive is realistic
A same-day return is realistic if you keep stops short.
Break Rhythm
1 planned break
A short stop every 2 to 3 hours is enough for this drive.
Midpoint
102.1 miles from Castle Rock, CO
A natural place for your longest stop of the day , about 1h 50m into the drive .
Who Is This Route For?
Weekend Trip
Doable as a same-day drive at 3h 51m. Total distance: 204.3 miles.
Family Friendly
Moderate complexity with 1 natural rest stops along the way.
Solo Traveler
3h 51m drive, comfortable solo distance.
Scenic Drive
Turn-heavy local drive route profile.
Drive Character
Expect a 3h 51m drive with frequent turns across 204.3 miles of local and secondary roads.
This route has more turning and local-road decision points than a simple highway run.
There are about 28 navigation steps in the underlying route data, so the final approach matters more than the middle miles.
West 7th Street is the longest continuous segment at about 71.4 miles.
How Hard Is This Drive?
Expect a hands-on drive with frequent turns and local roads rather than long highway stretches. This route has several spots where lane changes, forks, or exits need your full attention. The trickiest moment comes around 0.1 miles in near 3rd Street.
Driving Effort
7/10
Demanding - plan breaks and stay ahead of the key maneuvers
Balances navigation complexity with total wheel time.
This is a demanding drive. With 17 significant decision points across 204.3 miles, you will need to stay alert - especially through interchange areas and urban stretches. Consider splitting it into segments if you are not comfortable with fast highway navigation.
Where does it get tricky?
The main spots that need attention: at 0.1 miles (3rd Street): Roundabout - know your exit number before entering; at 0.2 miles (North Wilcox Street): Lane positioning matters here; at 0.4 miles (South Wilcox Street): Roundabout - know your exit number before entering.
Critical Maneuvers
5 of 17 key pointsThese are the spots where you need to pay the most attention. Preview them before you drive.
7
0.1 mi into trip
|
~0m in
|
3rd Street
Enter roundabout onto 3rd Street
Roundabout - know your exit number before entering
7
0.2 mi into trip
|
~0m in
|
North Wilcox Street
Turn left onto North Wilcox Street
Lane positioning matters here
Use the left lane.
6
0.4 mi into trip
|
~1m in
|
South Wilcox Street
Enter roundabout onto South Wilcox Street
Roundabout - know your exit number before entering
6
0.7 mi into trip
|
~2m in
|
West Plum Creek Parkway
Turn right onto West Plum Creek Parkway
Lane positioning matters here
Use the straight lane.
7
82.3 mi into trip
|
~1h 28m in
Take the exit toward 13th Street
Exit ramp - move to the correct lane early. Lane positioning matters here
Use the slight right lane.
Exit 99B
Toward 13th Street
Main Roads
| Road | Distance | Duration |
|---|---|---|
| West 7th Street | 71.4 mi | 1h 27m |
| John F. Kennedy Memorial Highway | 53.4 mi | 53m |
| I 25 | 32.4 mi | 33m |
| Ronald Reagan Highway | 22.9 mi | 23m |
| North Freeway | 9.7 mi | 11m |
| Monument Valley Freeway | 8.8 mi | 10m |
| I 25 Business | 2.8 mi | 4m |
| Fourth Street | 0.4 mi | 1m |
Longest stretch:
West 7th Street
— 71.4 mi, about 1h 27m
Turn-by-Turn Driving Directions
Step-by-step road directions between Castle Rock, CO and Alamosa, CO.
1
Start on North Cantril Street
90 ft
·
8 sec
·
North Cantril Street
2
Turn left onto 3rd Street
0.1 mi
·
22 sec
·
3rd Street
3
Continue on 3rd Street
442 ft
·
20 sec
·
3rd Street
4
Turn left onto North Wilcox Street
0.2 mi
·
38 sec
·
North Wilcox Street
Use the left lane.
5
Enter roundabout onto South Wilcox Street
40 ft
·
0 sec
·
South Wilcox Street
6
Continue on South Wilcox Street
0.3 mi
·
52 sec
·
South Wilcox Street
7
Turn right onto West Plum Creek Parkway
0.2 mi
·
34 sec
·
West Plum Creek Parkway
Use the straight lane.
8
Turn left onto Frontage Road
0.2 mi
·
29 sec
·
Frontage Road
Use the left lane.
9
Take the ramp
0.3 mi
·
37 sec
Toward I 25 South
10
Merge onto I 25
32 mi
·
33 min
·
I 25
Use the straight / slight right lanes.
11
Continue on I 25
8.8 mi
·
10 min
·
Monument Valley Freeway
Use the straight / slight right lanes.
12
Continue on I 25; US 24
0.2 mi
·
12 sec
·
Ronald Reagan Highway
13
Keep slight left at fork onto I 25
23 mi
·
23 min
·
Ronald Reagan Highway
Use the straight / slight right lanes.
14
Continue on I 25
13 mi
·
12 min
·
John F. Kennedy Memorial Highway
Use the straight / slight right lanes.
15
Continue on I 25
2.6 mi
·
2 min
·
North Freeway
Use the straight / slight right lanes.
16
Take the exit
0.4 mi
·
32 sec
Exit 100B
Toward 29th Street
17
Merge onto I 25; US 50
1.0 mi
·
1 min
·
North Freeway
18
Take the exit
0.1 mi
·
12 sec
Exit 99B
Toward 13th Street
Use the slight right lane.
19
Continue on this road
0.2 mi
·
18 sec
·
this road
20
Merge onto I 25; US 50 Bus
6.1 mi
·
7 min
·
North Freeway
Use the straight lane.
21
Continue on I 25
41 mi
·
40 min
·
John F. Kennedy Memorial Highway
22
Take the exit onto I 25 Business
2.8 mi
·
4 min
·
I 25 Business
Exit 52
Toward South I 25 Business, US 160 West: Walsenburg, Alamosa
23
Turn right onto US 160
71 mi
·
1 hr 27 min
·
West 7th Street
Use the straight / right lanes.
24
Continue on US 160; CO 17
0.3 mi
·
39 sec
·
Broadway Avenue
25
Continue on US 160; CO 17
521 ft
·
18 sec
·
Denver Avenue
26
Turn right onto Fourth Street
0.4 mi
·
1 min
·
Fourth Street
27
Turn right onto Ross Avenue
67 ft
·
1 sec
·
Ross Avenue
28
Arrive at destination
Ross Avenue
Trip Plan
Morning Departure
An early start around 7-8 AM gets you there with plenty of daylight left.
Evening Departure
A late afternoon start means arriving after dark. Morning is better.
You can normally do this drive in one day.
Plan roughly 1 meaningful break for fuel, food, and rest.
The halfway point lands around 102.1 miles from Castle Rock, CO, or about 1h 50m into the drive.
The longest continuous stretch on this route runs about 71.4 miles.
This is a comfortable same-day trip.
Departure
Before you leave
Start with fuel, water, and navigation already sorted so the first hour feels easy.
First stop
Around 45 miles or 49m in
Use this first pause for coffee, a restroom break, and a quick traffic check ahead.
Halfway reset
Around 102.1 miles or 1h 50m in
This is the best place for your longest stop, a real meal, and a full fuel check.
Final approach
Final hour starts around 3h 5m
Traffic, exits, and arrival timing usually matter more near Alamosa, CO than in the middle of the route.
Before You Leave
+
Open the route before leaving Castle Rock, CO so your first major turns are already loaded.
+
Leave with enough water and a charging cable within reach, not packed away.
+
Check your fuel range against the first long segment, especially if you are starting outside city service areas.
Day 1
Settle into the route from Castle Rock, CO
This is one driving day of about 204.3 miles and 3h 51m.
Your first comfortable stop window is around 45 miles from Castle Rock, CO.
This route can stay practical as a one-day drive if traffic stays reasonable.
Plan about 1 real break rather than only quick fuel stops.
The longest stretch is on West 7th Street for about 71.4 miles.
Where to Stop
Rest stops, refuel points, and overnight suggestions along this route.
Halfway Point
Midpoint
About 102.1 mi from Castle Rock, CO · 1h 50m into the drive
Mid-route town
Meal stop
102 mi into the route
Best for: Lunch, fuel, and a longer reset
This sits close to the middle of the route, so it works well for the longest stop of the day.
Pacing Suggestions
Fuel and coffee
A short stop after about 45 miles helps settle the day before fatigue starts building.
Meal break
The midpoint is around 102.1 miles from Castle Rock, CO, which is a good place for a longer meal and fuel stop.
Before the longest stretch
Fuel checkTop up before West 7th Street if your tank is already low. That segment runs about 71.4 miles.
Arriving in Alamosa, CO
The final approach into Alamosa, CO usually feels slower than the middle of the drive, so avoid planning your tightest schedule at the very end.
Try to arrive with enough fuel left to skip an immediate station stop unless you already know the area around Alamosa, CO.
These stop ideas are pacing suggestions — the exact town or exit can change with traffic, hotel plans, and fuel range.
Fuel & Cost
Regular Gas
$30.78 one way
$61.56 round trip
$3.83/gal
25.4 MPG avg
72 kg CO2
| Fuel Type | $/gal | One Way | Round Trip |
|---|---|---|---|
| midgrade | $4.05 | $32.59 | $65.18 |
| premium | $4.39 | $35.34 | $70.68 |
| diesel | $5.61 | $45.11 | $90.21 |
No toll roads detected on this route.
Estimated Trip Cost (one way, 1 person)
Fuel
$31
Meals
$25–$50
Total
$56–$81
Rough estimate based on US averages. Hotel $80–$140/night, meals $25–$50/day.
Estimated CO2 emission: 71.5 kg one way. Prices: EIA weekly data, 2026-04-13.
Driving Electric?
About $21 in charging · 0 stops · 66% less CO2
| Vehicle Type | kWh | Stops | DC Fast | Home Charge |
|---|---|---|---|---|
| Average EV | 61.3 | 0 | $21.45 | $9.81 |
| Efficient EV | 51.1 | 0 | $17.88 | $8.17 |
| EV Truck/SUV | 81.7 | 1 | $28.60 | $13.08 |
Gas CO2
71 kg
EV CO2
24 kg (66% less)
This trip is well within single-charge range for most EVs. No charging stops needed if you start fully charged.
DC fast charging avg $0.35/kWh. Home charging avg $0.16/kWh. US grid CO2: 0.39 kg/kWh.
Travel Intel
Current conditions at both ends of the drive.
Destination
Alamosa, CO
Afternoon in Alamosa on Friday
Local time
12:55 PM
MDT
Current temp
69°F
Unavailable
Live forecast
Seasonal Notes
Summer travel usually means heavier construction, hotter rest stops, and busier weekend traffic around major cities.
Winter travel shortens daylight, so a route that looks manageable on paper can feel much longer after dark.
Holiday weekends tend to make both departure and arrival windows slower than the raw route time suggests.
Time zone
Same local time
Origin and destination are on the same clock, so arrival timing is easier to judge at a glance.
Temperature spread
4 degrees cooler at arrival
A meaningful temperature swing is a good cue to rethink layers, water, and how soon you want to arrive.
Road read
3h 51m on the road
Use the two city cards together: check the sky where you start, then compare it with the local time and temperature at arrival.
Weather data from the National Weather Service. Conditions may change; check closer to your travel date.
Frequently Asked Questions
The drive from Castle Rock, CO to Alamosa, CO covers 204.3 miles and takes about 3h 51m without stops. Add 15-30 minutes for a fuel or rest stop on longer drives.
The main roads are West 7th Street, John F. Kennedy Memorial Highway, I 25. Expect a mix of highway and local road driving.
This is a comfortable same-day trip.
The midpoint is about 102.1 miles from Castle Rock, CO. Look for rest areas, gas stations, or food options near the halfway mark.
At current regular gas prices, expect to spend about $30.78 one way. This estimate uses 25.4 MPG — your actual cost will vary with your vehicle's fuel efficiency and current gas prices.
An early start around 7-8 AM gets you there with plenty of daylight left. A late afternoon start means arriving after dark. Morning is better.
Plan about 1 meaningful break for fuel, food, or rest. A short stop every 2 to 3 hours is enough for this drive.
This is a demanding drive. With 17 significant decision points across 204.3 miles, you will need to stay alert - especially through interchange areas and urban stretches. Consider splitting it into segments if you are not comfortable with fast highway navigation.
The main spots that need attention: at 0.1 miles (3rd Street): Roundabout - know your exit number before entering; at 0.2 miles (North Wilcox Street): Lane positioning matters here; at 0.4 miles (South Wilcox Street): Roundabout - know your exit number before entering.
The route from Castle Rock, CO to Alamosa, CO does not surface many named destination signs beyond the main corridor.
How this page is built
Compiled by the Trip.ovh planning team at COD Solutions Oy from open government datasets — OSRM over OpenStreetMap for geometry, and EIA for fuel prices. See our methodology for refresh cadence and limitations.
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