The drive from Longmont, CO to Alamosa, CO covers 269.4 miles and takes about 5h 6m behind the wheel.
This route is realistic as a one-day drive if you keep your stops efficient.
The route leans on North Valley Highway, West 7th Street, John F. Kennedy Memorial Highway for much of the mileage,
and the overall profile is turn-heavy local drive.
The longest uninterrupted segment is about 79.5 miles on North Valley Highway.
At current regular gas prices, budget about $40.59 one way before food or hotel costs.
Trip Pace
Same-day drive is realistic
A same-day return is possible, but it will make for a full day on the road.
Break Rhythm
1 planned break
Plan on a short reset every 3 to 4 hours to stay fresh behind the wheel.
Midpoint
134.7 miles from Longmont, CO
A natural place for your longest stop of the day
, about 2h 30m into the drive
.
Who Is This Route For?
Weekend Trip
Doable as a same-day drive at 5h 6m. Total distance: 269.4 miles.
Family Friendly
Moderate complexity with 1 natural rest stops along the way.
Solo Traveler
5h 6m drive, comfortable solo distance.
Scenic Drive
Turn-heavy local drive route profile with national parks nearby.
Drive Character
Expect a 5h 6m drive with frequent turns across 269.4 miles of local and secondary roads.
This route has more turning and local-road decision points than a simple highway run.
There are about 29 navigation steps in the underlying route data, so the final approach matters more than the middle miles.
North Valley Highway is the longest continuous segment at about 79.5 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 6.8 miles in near West I 25 Frontage Road.
Driving Effort9/10
High effort - long or complex enough to need steady focus all day
Balances navigation complexity with total wheel time.
This is a demanding drive. With 17 significant decision points across 269.4 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 6.8 miles (West I 25 Frontage Road): Exit ramp - move to the correct lane early. Lane positioning matters here; at 19.9 miles (I 25 / North Valley Highway): Highway fork - watch signs carefully. Lane positioning matters here; at 28.7 miles (I 25 / North Valley Highway): Highway fork - watch signs carefully. Lane positioning matters here.
Critical Maneuvers
5 of 17 key points
These are the spots where you need to pay the most attention. Preview them before you drive.
8
6.8 mi into trip|~10m in|West I 25 Frontage Road
Take the exit onto West I 25 Frontage Road toward I 25 South
Exit ramp - move to the correct lane early. Lane positioning matters here
Use the right lane.
Toward I 25 South
6
19.9 mi into trip|~24m in|I 25 / North Valley Highway
Keep slight right at fork onto I 25 / North Valley Highway
Highway fork - watch signs carefully. Lane positioning matters here
Use the straight / slight right lanes.
6
28.7 mi into trip|~34m in|I 25 / North Valley Highway
Keep slight right at fork onto I 25 / North Valley Highway
Highway fork - watch signs carefully. Lane positioning matters here
Use the straight / slight left lanes.
6
107.7 mi into trip|~2h 3m in|I 25 / Ronald Reagan Highway
Keep slight left at fork onto I 25 / Ronald Reagan Highway
Highway fork - watch signs carefully. Lane positioning matters here
Use the straight / slight right lanes.
7
147.4 mi into trip|~2h 44m 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
North Valley Highway
79.5 mi
1h 29m
West 7th Street
71.4 mi
1h 27m
John F. Kennedy Memorial Highway
53.4 mi
53m
Ronald Reagan Highway
22.9 mi
23m
Dwight D. Eisenhower Highway
11.9 mi
11m
North Freeway
9.7 mi
11m
Monument Valley Freeway
8.8 mi
10m
Highway 119
3 mi
3m
Longest stretch:
North Valley Highway
— 79.5 mi, about 1h 29m
Turn-by-Turn Driving Directions
Step-by-step road directions between Longmont, CO and Alamosa, CO.
1
Start on this road
63 ft·6 sec·this road
2
Turn right onto 5th Avenue
0.2 mi·47 sec·5th Avenue
3
Turn right onto Collyer Street
0.2 mi·41 sec·Collyer Street
4
Turn left onto 3rd Avenue
1.8 mi·3 min·3rd Avenue
5
Turn left onto CO 119
1.6 mi·2 min·East Ken Pratt Boulevard
Use the left lane.
6
Continue on CO 119
3.0 mi·3 min·Highway 119
7
Take the exit onto West I 25 Frontage Road
0.5 mi·1 min·West I 25 Frontage Road
Toward I 25 SouthUse the right lane.
8
Merge onto I 25
12 mi·11 min·Dwight D. Eisenhower Highway
Use the straight / slight right lanes.
9
Continue on I 25
0.6 mi·36 sec·North Valley Highway
10
Keep slight right at fork onto I 25
8.8 mi·10 min·North Valley Highway
Use the straight / slight right lanes.
11
Keep slight right at fork onto I 25
70 mi·1 hr 18 min·North Valley Highway
Use the straight / slight left lanes.
12
Continue on I 25
8.8 mi·10 min·Monument Valley Freeway
Use the straight / slight right lanes.
13
Continue on I 25; US 24
0.2 mi·12 sec·Ronald Reagan Highway
14
Keep slight left at fork onto I 25
23 mi·23 min·Ronald Reagan Highway
Use the straight / slight right lanes.
15
Continue on I 25
13 mi·12 min·John F. Kennedy Memorial Highway
Use the straight / slight right lanes.
16
Continue on I 25
2.6 mi·2 min·North Freeway
Use the straight / slight right lanes.
17
Take the exit
0.4 mi·32 sec
Exit 100BToward 29th Street
18
Merge onto I 25; US 50
1.0 mi·1 min·North Freeway
19
Take the exit
0.1 mi·12 sec
Exit 99BToward 13th StreetUse the slight right lane.
20
Continue on this road
0.2 mi·18 sec·this road
21
Merge onto I 25; US 50 Bus
6.1 mi·7 min·North Freeway
Use the straight lane.
22
Continue on I 25
41 mi·40 min·John F. Kennedy Memorial Highway
23
Take the exit onto I 25 Business
2.8 mi·4 min·I 25 Business
Exit 52Toward South I 25 Business, US 160 West: Walsenburg, Alamosa
24
Turn right onto US 160
71 mi·1 hr 27 min·West 7th Street
Use the straight / right lanes.
25
Continue on US 160; CO 17
0.3 mi·39 sec·Broadway Avenue
26
Continue on US 160; CO 17
521 ft·18 sec·Denver Avenue
27
Turn right onto Fourth Street
0.4 mi·1 min·Fourth Street
28
Turn right onto Ross Avenue
67 ft·1 sec·Ross Avenue
29
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 134.7 miles from Longmont, CO, or about 2h 30m into the drive.
The longest continuous stretch on this route runs about 79.5 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 59 miles or 1h 8m in
Use this first pause for coffee, a restroom break, and a quick traffic check ahead.
Halfway reset
Around 134.7 miles or 2h 30m in
This is the best place for your longest stop, a real meal, and a full fuel check.
Final approach
Final hour starts around 4h 6m
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 Longmont, 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 Longmont, CO
This is one driving day of about 269.4 miles and 5h 6m.
Your first comfortable stop window is around 59 miles from Longmont, 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 North Valley Highway for about 79.5 miles.
Where to Stop
Rest stops, refuel points, and overnight suggestions along this route.
Halfway Point
Midpoint
About 134.7 mi from Longmont, CO
· 2h 30m into the drive
Place data sourced from public business listings. Hours and availability may vary.
National Parks Near This Route
Worth a detour if your schedule allows.
Florissant Fossil Beds National Monument
National Monument
Beneath a grassy mountain valley in central Colorado lies one of the richest and most diverse fossil deposits in the world. Petrified redwood stumps up to 14 feet wide and thousands of detailed fossil...
24 mi from route
~60 min detour
$10
near mile 102.2
Station data from NREL Alternative Fuel Stations database.
Driving Electric?
About $28 in charging
· 0 stops
· 66% less CO2
Vehicle Type
kWh
Stops
DC Fast
Home Charge
Average EV
80.8
0
$28.29
$12.93
Efficient EV
67.4
0
$23.57
$10.78
EV Truck/SUV
107.8
1
$37.72
$17.24
Gas CO2
94 kg
EV CO2
32 kg (66% less)
Plan for 0 charging stops, roughly every 270 miles. Allow 25-40 minutes per stop at a DC fast charger.
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.
Forecast as of Apr 16, 2026
Origin
Longmont, CO
Late night
in Longmont on Saturday
Local time
1:40 AM
MDT
Current temp
76°F
Partly Sunny
SSW 10 to 16 mph0% chanceLive forecast
Freeze Warning
Freeze Warning issued April 16 at 5:34PM MDT until April 18 at 8:00AM MDT by NWS Pueblo CO
Freeze Warning
Freeze Warning issued April 16 at 12:55PM MDT until April 18 at 8:00AM MDT by NWS Goodland KS
Destination
Alamosa, CO
Late night
in Alamosa on Saturday
Local time
1:40 AM
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
7 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
5h 6m on the road
An early start around 7-8 AM gets you there with plenty of daylight left.
Weather data from the National Weather Service. Conditions may change; check closer to your travel date.
Frequently Asked Questions
The drive from Longmont, CO to Alamosa, CO covers 269.4 miles and takes about 5h 6m without stops. Add 15-30 minutes for a fuel or rest stop on longer drives.
The main roads are North Valley Highway, West 7th Street, John F. Kennedy Memorial Highway. Expect a mix of highway and local road driving.
This is a comfortable same-day trip.
The midpoint is about 134.7 miles from Longmont, CO. Look for rest areas, gas stations, or food options near the halfway mark.
At current regular gas prices, expect to spend about $40.59 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. Plan on a short reset every 3 to 4 hours to stay fresh behind the wheel.
This is a demanding drive. With 17 significant decision points across 269.4 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 6.8 miles (West I 25 Frontage Road): Exit ramp - move to the correct lane early. Lane positioning matters here; at 19.9 miles (I 25 / North Valley Highway): Highway fork - watch signs carefully. Lane positioning matters here; at 28.7 miles (I 25 / North Valley Highway): Highway fork - watch signs carefully. Lane positioning matters here.
The route from Longmont, CO to Alamosa, CO does not surface many named destination signs beyond the main corridor.
Yes. Nearby national parks include Florissant Fossil Beds National Monument.
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, EIA for fuel prices, NREL for EV charging, and NPS for national parks. See our methodology for refresh cadence and limitations.
