Portales, NM to Los Alamos, NM is 256.4 miles and takes about 5h 11m via South Abilene Avenue, East 1st Street, and North Main Avenue, with a fuel budget near $37 and enough daylight to finish in a day. This route stays within New Mexico's Desert Southwest region for its entirety. Expect a drive primarily on surface roads, which means you'll be navigating through towns and local areas rather than high-speed highways. Given the 5-hour duration and surface road profile, it's a manageable one-day trip, but you'll want to be mindful of your pace through populated areas.
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
128.2 miles from Portales, NM
A natural place for your longest stop of the day
, about 2h 34m into the drive
.
Main Roads
Road
Distance
Duration
I 40
58.2 mi
58m
US Highway 285
41.3 mi
49m
US Highway 84
41.1 mi
46m
Denby Avenue
35.6 mi
41m
NM 267
17.4 mi
23m
Los Alamos Highway
16.4 mi
24m
South Roosevelt Road 5
13.8 mi
20m
Taos Highway
12.2 mi
14m
Longest stretch:
I 40
— 58.2 mi, about 58m
Turn-by-Turn Driving Directions
Step-by-step road directions between Portales, NM and Los Alamos, NM.
1
Start on NM 88
183 ft·4 sec·East 3rd Street
2
Continue on NM 88
0.1 mi·17 sec·South Abilene Avenue
3
Turn left onto US 70
387 ft·17 sec·East 1st Street
4
Turn right onto North Main Avenue
0.2 mi·27 sec·North Main Avenue
5
Turn left onto NM 236
0.8 mi·1 min·West Fir Street
6
Continue on NM 267
14 mi·20 min·South Roosevelt Road 5
7
Turn straight onto NM 267
17 mi·23 min·NM 267
8
Turn left onto US 60; US 84
36 mi·41 min·Denby Avenue
9
Continue on US 60; US 84
1.3 mi·1 min·East Sumner Avenue
10
Turn right onto US 84
0.6 mi·42 sec·North 4th Street
11
Continue on US 84
41 mi·46 min·US Highway 84
12
Continue on US 84
0.1 mi·11 sec·Historic Route 66
13
Turn left
0.3 mi·34 sec
Toward I 40 West
14
Merge onto I 40
58 mi·58 min·I 40
15
Take the exit
0.3 mi·45 sec
Toward US 285: Vaughn, Santa Fe
16
Turn right onto US 285
41 mi·49 min·US Highway 285
Use the right lane.
17
Turn left onto US 285
0.2 mi·28 sec·US 285
18
Merge onto I 25
5.9 mi·5 min·I 25
19
Take the exit
0.2 mi·23 sec
Toward NM 466: Old Pecos Trail
20
Keep slight right at fork
499 ft·13 sec
21
Turn straight onto NM 466
1.2 mi·2 min·Old Pecos Trail
22
Keep slight right at fork onto Old Pecos Trail
1.7 mi·3 min·Old Pecos Trail
23
Continue on Old Santa Fe Trail
0.6 mi·1 min·Old Santa Fe Trail
24
Turn left onto East Alameda Street
0.4 mi·1 min·East Alameda Street
25
Turn right onto North Guadalupe Street
0.8 mi·1 min·North Guadalupe Street
Use the left / straight lanes.
26
Take the ramp
0.3 mi·34 sec
27
Merge onto US 84; US 285
1.5 mi·1 min·North Saint Francis Drive
28
Continue on US 84; US 285
12 mi·14 min·Taos Highway
29
Continue on US 84; US 285
0.9 mi·1 min·Santa Fe Highway
Use the left / straight / right lanes.
30
Take the exit
0.1 mi·21 sec
Toward NM 502: Los Alamos HighwayUse the straight / slight right lanes.
31
Keep slight left at fork
490 ft·15 sec
Toward NM 502: Los Alamos HighwayUse the straight lane.
32
Merge onto NM 502
16 mi·24 min·Los Alamos Highway
33
Enter roundabout onto Central Avenue
94 ft·1 sec·Central Avenue
34
Continue on Central Avenue
0.9 mi·1 min·Central Avenue
35
Continue on Canyon Road
0.6 mi·1 min·Canyon Road
36
Turn right onto Diamond Drive
0.3 mi·39 sec·Diamond Drive
37
Turn right onto Orange Street
0.4 mi·1 min·Orange Street
38
Continue on Orange Street
0.3 mi·45 sec·Orange Street
39
Arrive at destination
Orange Street
Trip Plan
For this 256.4-mile drive, leaving Portales in the morning is your best bet to maximize daylight. Since it’s a single-day trip, you can afford to take your time. Plan for your single scheduled stop, and consider an extra break if needed, especially since you'll be on surface roads for the full 5h 11m duration. Keep an eye on your fuel gauge, as finding a gas station might be less frequent on surface roads compared to interstates; aim to refuel in larger towns along the way. Pay attention to local speed limits as you pass through towns.
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 128.2 miles from Portales, NM, or about 2h 34m into the drive.
The longest continuous stretch on this route runs about 58.2 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 56 miles or 1h 13m in
Use this first pause for coffee, a restroom break, and a quick traffic check ahead.
Halfway reset
Around 128.2 miles or 2h 34m 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 5m
Traffic, exits, and arrival timing usually matter more near Los Alamos, NM than in the middle of the route.
Before You Leave
+
Open the route before leaving Portales, NM 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 Portales, NM
This is one driving day of about 256.4 miles and 5h 11m.
Your first comfortable stop window is around 56 miles from Portales, NM.
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 I 40 for about 58.2 miles.
Where to Stop
Rest stops, refuel points, and overnight suggestions along this route.
Place data sourced from public business listings. Hours and availability may vary.
Heads-up: tricky spots
5 of 23
5 decision points cluster between mile 0.1 and 237.4 — GPS handles the exact turns, but know they're coming. Your lane choice matters more than the turn itself.
5
0.1 mi into trip|~0m in|US 70 / East 1st Street
Turn left onto US 70 / East 1st Street
Navigation decision point
5
0.2 mi into trip|~0m in|North Main Avenue
Turn right onto North Main Avenue
Navigation decision point
6
169.9 mi into trip|~3h 16m in|US 285 / US Highway 285
Turn right onto US 285 / US Highway 285
Lane positioning matters here
Use the right lane.
6
237.2 mi into trip|~4h 40m in
Take the exit toward NM 502: Los Alamos Highway
Exit ramp - move to the correct lane early. Lane positioning matters here
Use the straight / slight right lanes.
Toward NM 502: Los Alamos Highway
8
237.4 mi into trip|~4h 41m in
Keep slight left at fork toward NM 502: Los Alamos Highway
Highway fork - watch signs carefully. Lane positioning matters here
Use the straight lane.
Toward NM 502: Los Alamos Highway
Fuel & Cost
Regular Gas
$37.56 one way
$75.12 round trip
$3.72/gal25.4 MPG avg90 kg CO2
Fuel Type
$/gal
One Way
Round Trip
midgrade
$4.13
$41.70
$83.40
premium
$4.49
$45.28
$90.57
diesel
$5.60
$56.52
$113.04
No toll roads detected on this route.
Estimated Trip Cost (one way, 1 person)
Fuel
$38
Meals
$25–$50
Total
$63–$88
Rough estimate based on US averages. Hotel $80–$140/night, meals $25–$50/day.
Estimated CO2 emission: 89.7 kg one way.
Prices: EIA weekly data, 2026-08-31.
Driving Electric?
About $27 in charging
· 0 stops
· 67% less CO2
Vehicle Type
kWh
Stops
DC Fast
Home Charge
Average EV
76.9
0
$26.92
$12.31
Efficient EV
64.1
0
$22.44
$10.26
EV Truck/SUV
102.6
1
$35.90
$16.41
Gas CO2
90 kg
EV CO2
30 kg (67% 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 Sep 4, 2026
Origin
Portales, NM
Afternoon
in Portales on Saturday
Local time
2:55 PM
MDT
Current temp
68°F
Unavailable
Live forecast
Destination
Los Alamos, NM
Afternoon
in Los Alamos on Saturday
Local time
2:55 PM
MDT
Current temp
59°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
9 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 11m 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.
National Parks Near This Route
Worth a detour if your schedule allows.
Manhattan Project National Historical Park
National Historical Park
The Manhattan Project is one of the most transformative events of the 20th century. It ushered in the nuclear age with the development of the world’s first atomic bombs. Most of this development took...
1 mi from route
~1 min detour
Free
near mile 256.4
Bandelier National Monument protects over 33,000 acres of ruggedly beautiful canyon and mesa country. Petroglyphs, dwellings carved into the soft rock cliffs, and standing masonry walls pay tribute to...
8 mi from route
~19 min detour
$25
near mile 256.4
Pecos is a natural and cultural crossroads through which hunters, gatherers, traders, missionaries, immigrants, soldiers, ranchers, and other travelers passed and lived. Follow in their footsteps and...
12 mi from route
~29 min detour
Free
near mile 212.2
Park data from the National Park Service API. Alerts update every 2 hours.
More Details
What kind of drive is this?
This drive is almost entirely on surface roads, with 0% highway travel. You'll begin on South Abilene Avenue and East 1st Street before transitioning to North Main Avenue. With the longest stretch not specified, anticipate frequent intersections and varying speed limits as you move through communities. The lack of highway means you'll experience a more grounded perspective, observing the local landscape and pace of life directly.
64% highway — fuel and pacing are the main things to plan.
39 navigation steps total — most of the decisions cluster near the start and finish.
Longest single stretch: 58.2 mi on I 40.
How Hard Is This Drive?
9/10
This is a straightforward highway drive that stays mostly on I 40 and US Highway 285. 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 US 70 / East 1st Street.
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 23 significant decision points across 256.4 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 0.1 miles (US 70 / East 1st Street): Navigation decision point; at 0.2 miles (North Main Avenue): Navigation decision point; at 169.9 miles (US 285 / US Highway 285): Lane positioning matters here.
Elevation Profile
High-altitude sections with notable climbs
7,221 ft4,006 ft
Total Climb
5,257 ft
Total Descent
2,042 ft
Highest Point
7,221 ft
~256.4 mi in
Elevation Range
3,215 ft
Notable High Points
4,408 ft at ~36.6 miles+235 ft prominence
6,857 ft at ~183.1 miles+50 ft prominence
7,106 ft at ~219.8 miles+733 ft prominence
Towns Mentioned on Route Signs
Based on OSRM destination-sign hints, not a full list of every settlement the road passes.
On the drive from Portales, NM to Los Alamos, NM, road signs begin pointing toward Santa Fe along the way.
Portales is a small, fairly quiet college and agricultural town in Southeast New Mexico, United States. Home of Eastern New Mexico University. Nearest sizable town is Clovis; close to Cannon Air Force Base. Located almost adjacent to the Texas border. 90 miles from Roswell of UFO fame.
Top landmarks
•Administration Building — historic building at Eastern New Mexico University, USA
•Portales Main Post Office — post office in Portales, New Mexico, United States
•Bank of Portales — bank building in Portales, New Mexico
Los Alamos is a small town in northern New Mexico, about an hour northwest of Santa Fe. Its claim to fame is the Los Alamos National Laboratory (LANL), where Oppenheimer and other physicists created the world's first atomic bomb during World War II, concluding the Golden Age of Modern Physics and heralding the Atomic Age. Many of Los Alamos's 12,000 residents work at the laboratory. White Rock, with about 6,000, is a part of Los Alamos, but is separated from the main town by LANL. Nearly all of LANL is closed to the public, but the town has a couple of museums which are good places to learn about the history of the town.
Top landmarks
•Manhattan Project National Historical Park — Historic Park covering Manhattan Project infrastructure in New Mexico, Tennessee...
Doable as a same-day drive at 5h 11m. Total distance: 256.4 miles.
Family Friendly
Moderate complexity with 1 natural rest stops along the way.
Solo Traveler
5h 11m drive, comfortable solo distance.
Frequently Asked Questions
The longest stretch is about 58.2 miles on I 40. The full list of main roads is in the Roads section above.
We did not find dedicated rest areas on this route. For a drive this long, plan bathroom and stretch breaks around gas stations, fast-food stops, or small-town downtowns — check the Nearby Places section for options.
It helps. This route has a higher-than-average number of complex decision points, which get harder in the dark. If the last hour of the trip is on surface roads or mountain grades, aim to arrive at Los Alamos, NM before sunset when you can. Check the Trip Plan for departure windows that land you in daylight.
Only with planning. This is a long drive for kids — consider splitting it into two days rather than pushing through. Plan at least 1 meaningful breaks. Dedicated rest areas are limited, so plan gas or food stops as your bathroom breaks.
Mostly yes along the main roads, but rural stretches through NM can have sparse or no coverage. Before you leave, download offline Google Maps or Apple Maps for the route, and consider downloading music or podcasts instead of streaming. If you depend on data for navigation, keep a paper backup of the turn-by-turn directions.
The main spots that need attention: at 0.1 miles (US 70 / East 1st Street): Navigation decision point; at 0.2 miles (North Main Avenue): Navigation decision point; at 169.9 miles (US 285 / US Highway 285): Lane positioning matters here.
Yes — Manhattan Project National Historical Park, Bandelier National Monument and Pecos National Historical Park. See the National Parks section for detour distances and tips on detours.
Not recommended in a single day. At 5.2 hours each way, a round trip means 10.4 hours of driving — that is an unsafe level of fatigue for most drivers. Plan at least one night at Los Alamos, NM before the return drive.
