Ashton, ID to Nampa, ID is 352 miles and takes about 5h 51m via Vietnam Veterans Memorial Highway and I 86, with a fuel budget near $57 and enough daylight to finish in a day. This drive stays within the Mountain West region, connecting two points in Idaho. Given its duration and mostly surface road profile, you can expect a fairly straightforward trip. It's a manageable one-day drive, so you can depart at your leisure and arrive in Nampa by evening.
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
176 miles from Ashton, ID
A natural place for your longest stop of the day
, about 2h 55m into the drive
.
Main Roads
Road
Distance
Duration
Vietnam Veterans Memorial Highway
183 mi
2h 55m
I 86
62.7 mi
59m
Veterans Memorial Highway
46.5 mi
44m
Idaho Medal of Honor Highway
31.7 mi
34m
Yellowstone Highway
17.2 mi
18m
Rigby Highway
3.1 mi
3m
Garrity Boulevard
1.4 mi
2m
East Amity Avenue
1.2 mi
2m
Longest stretch:
Vietnam Veterans Memorial Highway
— 183 mi, about 2h 55m
Traffic on I-84
Hour-of-day weekday pattern from 131 FHWA count stations on your route.
Peak
4 PM
~2,795 veh/hr typical
Quietest
2 AM
~181 veh/hr
Peak-to-quiet ratio
15.4×
busier at peak than in the quiet hours
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Averaged across 52 weeks of 2023 FHWA Travel Monitoring Analysis System data. Weekday hours only (Mon–Fri).
Turn-by-Turn Driving Directions
Step-by-step road directions between Ashton, ID and Nampa, ID.
1
Start on ID-47
0.4 mi·48 sec·Main Street
2
Turn left onto US 20
16 mi·17 min·Idaho Medal of Honor Highway
3
Continue on US 20
17 mi·18 min·Yellowstone Highway
4
Continue on US 20
15 mi·16 min·Idaho Medal of Honor Highway
5
Continue on US 20
3.1 mi·3 min·Rigby Highway
6
Merge onto US 20
0.1 mi·14 sec·Grandview Drive
7
Take the exit onto US 20
0.3 mi·36 sec·US 20
Toward I 15 South: Arco, Pocatello
8
Merge onto I 15; US 20
47 mi·44 min·Veterans Memorial Highway
9
Take the exit
0.6 mi·43 sec
Exit 72Toward I 86 West: Chubbuck, Twin Falls
10
Continue on I 86
63 mi·59 min·I 86
11
Continue on I 84; US 30
183 mi·2 hr 55 min·Vietnam Veterans Memorial Highway
Use the straight / slight right lanes.
12
Take the exit onto I 84 Business
0.4 mi·52 sec·I 84 Business
Exit 38Toward I 84 Business: Garrity Boulevard, Idaho Center BoulevardUse the slight right lane.
13
Turn left onto I 84 Business
1.4 mi·2 min·Garrity Boulevard
14
Turn left onto North Kings Road
0.8 mi·1 min·North Kings Road
Use the left lane.
15
Enter roundabout onto South Kings Road
125 ft·2 sec·South Kings Road
16
Continue on South Kings Road
1.0 mi·2 min·South Kings Road
17
Turn right onto East Amity Avenue
1.2 mi·2 min·East Amity Avenue
18
Continue on Diamond Street
0.2 mi·15 sec·Diamond Street
19
Continue on East Colorado Avenue
0.2 mi·35 sec·East Colorado Avenue
20
Turn left onto Holly Street
0.3 mi·44 sec·Holly Street
21
Continue on Sunny Ridge Road
1.0 mi·2 min·Sunny Ridge Road
22
Turn right onto Stony Meadow Drive
187 ft·8 sec·Stony Meadow Drive
23
Arrive at destination
Stony Meadow Drive
Trip Plan
With a total drive time under 6 hours, this route is easily completed in a single day. Consider an early morning departure from Ashton to maximize your daylight. There's only one recommended stop, so plan your fuel and rest breaks accordingly, especially since the longest continuous driving segment is 183 miles. Keep an eye on your fuel gauge as you transition from highway to surface roads, as services might become less frequent.
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 176 miles from Ashton, ID, or about 2h 55m into the drive.
The longest continuous stretch on this route runs about 183 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 77 miles or 1h 21m in
Use this first pause for coffee, a restroom break, and a quick traffic check ahead.
Halfway reset
Around 176 miles or 2h 55m 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 46m
Traffic, exits, and arrival timing usually matter more near Nampa, ID than in the middle of the route.
Before You Leave
+
Open the route before leaving Ashton, ID 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 Ashton, ID
This is one driving day of about 352 miles and 5h 51m.
Your first comfortable stop window is around 77 miles from Ashton, ID.
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 Vietnam Veterans Memorial Highway for about 183 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 12
5 decision points cluster between mile 52.5 and 350.7 — GPS handles the exact turns, but know they're coming. Your lane choice matters more than the turn itself.
6
52.5 mi into trip|~57m in|US 20
Take the exit onto US 20 toward I 15 South: Arco, Pocatello
Exit ramp - move to the correct lane early. Multiple destination signs - pick the right one
Toward I 15 South: Arco, Pocatello
6
99.3 mi into trip|~1h 42m in
Take the exit toward I 86 West: Chubbuck, Twin Falls
Exit ramp - move to the correct lane early. Multiple destination signs - pick the right one
Exit 72
Toward I 86 West: Chubbuck, Twin Falls
8
345.6 mi into trip|~5h 37m in|I 84 Business
Take the exit onto I 84 Business toward I 84 Business: Garrity Boulevard, Idaho Center Boulevard
Exit ramp - move to the correct lane early. Lane positioning matters here. Multiple destination signs - pick the right one
Use the slight right lane.
Exit 38
Toward I 84 Business: Garrity Boulevard, Idaho...
5
347.4 mi into trip|~5h 40m in|North Kings Road
Turn left onto North Kings Road
Lane positioning matters here
Use the left lane.
5
350.7 mi into trip|~5h 47m in|Holly Street
Turn left onto Holly Street
Navigation decision point
Fuel & Cost
Regular Gas
$54.86 one way
$109.73 round trip
$3.96/gal25.4 MPG avg123 kg CO2
Fuel Type
$/gal
One Way
Round Trip
midgrade
$4.17
$57.83
$115.66
premium
$4.47
$62.00
$124.00
diesel
$4.80
$66.46
$132.93
No toll roads detected on this route.
Estimated Trip Cost (one way, 1 person)
Fuel
$55
Meals
$25–$50
Total
$80–$105
Rough estimate based on US averages. Hotel $80–$140/night, meals $25–$50/day.
Estimated CO2 emission: 123.2 kg one way.
Prices: EIA weekly data, 2026-07-13.
Driving Electric?
About $37 in charging
· 1 stop
· 67% less CO2
Vehicle Type
kWh
Stops
DC Fast
Home Charge
Average EV
105.6
1
$36.96
$16.90
Efficient EV
88
1
$30.80
$14.08
EV Truck/SUV
140.8
1
$49.28
$22.53
Gas CO2
123 kg
EV CO2
41 kg (67% less)
Plan for 1 charging stop. A 30-minute DC fast charge mid-route should be enough to complete the trip comfortably.
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 Jul 17, 2026
Origin
Ashton, ID
Late night
in Ashton on Sunday
Local time
1:13 AM
MDT
Current temp
58°F
Isolated Showers And Thunderstorms
ENE 7 mph16% chanceLive forecast
Special Weather Statement
Special Weather Statement issued July 17 at 3:14AM PDT by NWS Spokane WA
Flash Flood Watch
Flash Flood Watch issued July 17 at 1:26AM MDT until July 17 at 9:00PM MDT by NWS Pocatello ID
Destination
Nampa, ID
Late night
in Nampa on Sunday
Local time
1:13 AM
MDT
Current temp
65°F
Mostly Clear
WSW 5 mph2% chanceLive forecast
Special Weather Statement
Special Weather Statement issued July 17 at 3:14AM PDT by NWS Spokane WA
Flash Flood Watch
Flash Flood Watch issued July 17 at 1:26AM MDT until July 17 at 9:00PM MDT by NWS Pocatello ID
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 warmer at arrival
A meaningful temperature swing is a good cue to rethink layers, water, and how soon you want to arrive.
Road read
5h 51m 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.
Hagerman Fossil Beds National Monument
National Monument
During the Pliocene, this place looked quite different. Lush wetlands, forests, and grasslands provided excellent habitat for a variety of animals. From fascinating, now-extinct creatures like the sab...
9 mi from route
~22 min detour
Free
near mile 242.8
Caution: Use Caution with "Fossil Beds Information" Signs
Caution: If You Can't Reach Us By Phone, Please Email Us
Park data from the National Park Service API. Alerts update every 2 hours.
More Details
What kind of drive is this?
You'll spend 18% of this 352-mile drive on highways, with the longest stretch being 183 miles on Vietnam Veterans Memorial Highway. After this highway segment, you'll transition to predominantly surface roads for the remainder of the trip. Expect a mix of rural cruising and areas with more frequent exits as you approach your destination.
Only 18% highway — the rest is turn-by-turn surface driving.
23 navigation steps total — most of the decisions cluster near the start and finish.
Longest single stretch: 183 mi on Vietnam Veterans Memorial Highway.
How Hard Is This Drive?
5/10
Expect a hands-on drive with frequent turns and local roads rather than long highway stretches. You will hit about 12 points where you need to pay attention to lane position or signs. The trickiest moment comes around 52.5 miles in near US 20.
Driving Effort5/10
Moderate - straightforward overall, but long enough or busy enough to require pacing
Balances navigation complexity with total wheel time.
This drive requires moderate attention. Across 352 miles you will encounter 12 spots where lane choice or exit timing matters. Not difficult for experienced highway drivers, but worth previewing the tricky sections before you go.
Where does it get tricky?
The main spots that need attention: at 52.5 miles (US 20): Exit ramp - move to the correct lane early. Multiple destination signs - pick the right one; at 99.3 miles: Exit ramp - move to the correct lane early. Multiple destination signs - pick the right one; at 345.6 miles (I 84 Business): Exit ramp - move to the correct lane early. Lane positioning matters here. Multiple destination signs - pick the right one.
Elevation Profile
High-altitude sections with notable climbs
5,261 ft2,520 ft
Total Climb
366 ft
Total Descent
3,107 ft
Highest Point
5,261 ft
Elevation Range
2,741 ft
Towns Mentioned on Route Signs
Based on OSRM destination-sign hints, not a full list of every settlement the road passes.
Between Ashton, ID and Nampa, ID, road signs point toward Pocatello and Twin Falls.
Doable as a same-day drive at 5h 51m. Total distance: 352 miles.
Family Friendly
Moderate complexity with 1 natural rest stops along the way.
Solo Traveler
5h 51m drive, comfortable solo distance.
First-Time Driver
Mostly highway driving (18%). Some complex stretches to watch for.
Scenic Drive
Mostly surface roads route profile with national parks nearby.
Frequently Asked Questions
The longest stretch is about 183 miles on Vietnam Veterans Memorial Highway. The full list of main roads is in the Roads section above.
Yes — we found about 20 rest areas or service plazas within a short detour of the route (from OpenStreetMap). See the Rest Stops tab under Nearby Places for locations and mile markers. Plan to stretch, use the bathroom, and top off fluids every 2–3 hours on longer drives.
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. There are 20 rest areas along the route for bathroom stops.
Mostly yes along the main roads, but rural stretches through ID 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 52.5 miles (US 20): Exit ramp - move to the correct lane early. Multiple destination signs - pick the right one; at 99.3 miles: Exit ramp - move to the correct lane early. Multiple destination signs - pick the right one; at 345.6 miles (I 84 Business): Exit ramp - move to the correct lane early. Lane positioning matters here. Multiple destination signs - pick the right one.
Yes — Hagerman Fossil Beds National Monument. See the National Parks section for detour distances and tips on detours.
Not recommended in a single day. At 5.9 hours each way, a round trip means 11.7 hours of driving — that is an unsafe level of fatigue for most drivers. Plan at least one night at Nampa, ID before the return drive.
