Ashton, ID to Boise, ID is 333 miles and takes about 5h 26m via Vietnam Veterans Memorial Highway and I 86, with a fuel budget near $53 and enough daylight to finish in a day. This trip stays within Idaho, connecting two points in the Mountain West region. Expect a drive that's mostly on surface roads, offering a more grounded perspective of the landscape between these two cities. It's a straightforward trip, suitable for a single day if you're looking to get from point A to B efficiently.
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
166.5 miles from Ashton, ID
A natural place for your longest stop of the day
, about 2h 46m into the drive
.
Main Roads
Road
Distance
Duration
Vietnam Veterans Memorial Highway
166.5 mi
2h 36m
I 86
62.7 mi
59m
Veterans Memorial Highway
46.5 mi
44m
Idaho Medal of Honor Highway
32 mi
34m
Yellowstone Highway
17.2 mi
18m
Rigby Highway
3.1 mi
3m
South Broadway Avenue
2.9 mi
5m
East Front Street
0.6 mi
1m
Longest stretch:
Vietnam Veterans Memorial Highway
— 166.5 mi, about 2h 36m
Traffic on I-84
Hour-of-day weekday pattern from 62 FHWA count stations on your route.
Peak
4 PM
~1,309 veh/hr typical
· worst 1,626
Quietest
2 AM
~114 veh/hr
Peak-to-quiet ratio
11.5×
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 Boise, 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
166 mi·2 hr 36 min·Vietnam Veterans Memorial Highway
12
Take the exit onto US 20; US 26
0.3 mi·34 sec·Idaho Medal of Honor Highway
Exit 54Toward US 20, US 26: Broadway Avenue
13
Keep slight right at fork onto US 20; US 26
438 ft·12 sec·Idaho Medal of Honor Highway
Toward US 20, US 26: Boise State University, City Center:Convention CenterUse the slight right lane.
14
Turn right onto US 20; US 26
2.9 mi·5 min·South Broadway Avenue
Use the straight / left / right lanes.
15
Turn left onto US 20; US 26
0.6 mi·1 min·East Front Street
16
Turn right
55 ft·4 sec
17
Arrive at destination
Trip Plan
Given the 5h 26m estimated drive time, you can comfortably complete this trip in a single day. Leaving Ashton, ID in the morning should allow ample time to reach Boise, ID before evening. With only one recommended stop, plan your refueling and rest breaks strategically, perhaps around the halfway point or when you note fuel options are becoming less frequent. The longest stretch on Vietnam Veterans Memorial Highway is quite substantial, so ensure you're well-fueled before embarking on it.
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 166.5 miles from Ashton, ID, or about 2h 46m into the drive.
The longest continuous stretch on this route runs about 166.5 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 73 miles or 1h 17m in
Use this first pause for coffee, a restroom break, and a quick traffic check ahead.
Halfway reset
Around 166.5 miles or 2h 46m 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 25m
Traffic, exits, and arrival timing usually matter more near Boise, 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 333 miles and 5h 26m.
Your first comfortable stop window is around 73 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 166.5 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 10
5 decision points cluster between mile 52.5 and 329.5 — 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
6
329.1 mi into trip|~5h 18m in|US 20; US 26 / Idaho Medal of Honor Highway
Take the exit onto US 20; US 26 / Idaho Medal of Honor Highway toward US 20, US 26: Broadway Avenue
Exit ramp - move to the correct lane early. Multiple destination signs - pick the right one
Exit 54
Toward US 20, US 26: Broadway Avenue
9
329.4 mi into trip|~5h 19m in|US 20; US 26 / Idaho Medal of Honor Highway
Keep slight right at fork onto US 20; US 26 / Idaho Medal of Honor Highway toward US 20, US 26: Boise State University, City Center:Convention Center
Highway fork - watch signs carefully. Lane positioning matters here. Multiple destination signs - pick the right one
Use the slight right lane.
Toward US 20, US 26: Boise State University, Ci...
5
329.5 mi into trip|~5h 19m in|US 20; US 26 / South Broadway Avenue
Turn right onto US 20; US 26 / South Broadway Avenue
Lane positioning matters here
Use the straight / left / right lanes.
Fuel & Cost
Regular Gas
$51.90 one way
$103.81 round trip
$3.96/gal25.4 MPG avg117 kg CO2
Fuel Type
$/gal
One Way
Round Trip
midgrade
$4.17
$54.71
$109.42
premium
$4.47
$58.66
$117.31
diesel
$4.80
$62.88
$125.75
No toll roads detected on this route.
Estimated Trip Cost (one way, 1 person)
Fuel
$52
Meals
$25–$50
Total
$77–$102
Rough estimate based on US averages. Hotel $80–$140/night, meals $25–$50/day.
Estimated CO2 emission: 116.5 kg one way.
Prices: EIA weekly data, 2026-07-13.
Driving Electric?
About $35 in charging
· 1 stop
· 67% less CO2
Vehicle Type
kWh
Stops
DC Fast
Home Charge
Average EV
99.9
1
$34.97
$15.98
Efficient EV
83.3
0
$29.14
$13.32
EV Truck/SUV
133.2
1
$46.62
$21.31
Gas CO2
117 kg
EV CO2
39 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
89°F
Isolated Showers And Thunderstorms
SSE 2 to 6 mph40% chanceLive forecast
Red Flag Warning
Red Flag Warning issued July 17 at 6:55AM PDT until July 17 at 11:00AM 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
Boise, ID
Late night
in Boise on Sunday
Local time
1:13 AM
MDT
Current temp
100°F
Isolated Showers And Thunderstorms
WSW 2 to 6 mph21% chanceLive forecast
Red Flag Warning
Red Flag Warning issued July 17 at 6:55AM PDT until July 17 at 11:00AM 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
92°F
Aberdeen, ID
167 mi in
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
11 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 26m 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...
8 mi from route
~20 min detour
Free
near mile 241.1
Park data from the National Park Service API. Alerts update every 2 hours.
More Details
What kind of drive is this?
You'll spend about 19% of your time on highways, with the bulk of the 333 miles on surface roads. The longest continuous stretch on a highway is 166.5 miles on Vietnam Veterans Memorial Highway. After this main highway section, you'll transition to more local roads. Be prepared for a change in pace and potential for more frequent stops as you move off the interstate.
Only 19% highway — the rest is turn-by-turn surface driving.
17 navigation steps total — most of the decisions cluster near the start and finish.
Longest single stretch: 166.5 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 10 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 333 miles you will encounter 10 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 329.1 miles (US 20; US 26 / Idaho Medal of Honor Highway): Exit ramp - move to the correct lane early. Multiple destination signs - pick the right one.
Elevation Profile
High-altitude sections with notable climbs
5,261 ft2,611 ft
Total Climb
748 ft
Total Descent
3,309 ft
Highest Point
5,261 ft
Elevation Range
2,650 ft
Notable High Points
4,631 ft at ~95.1 miles+53 ft prominence
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 Boise, ID, road signs point toward Pocatello and Twin Falls.
Boise is the capital and largest city of Idaho. Boise offers numerous recreational opportunities, including extensive hiking and biking in the foothills to the immediate north of downtown. Boise is a regional hub for jazz, theater, and indie music, and is home to several museums.
Top landmarks
•Idaho State Capitol — Idaho state capitol building in Boise, Idaho, U.S.A.
•Cathedral of St. John the Evangelist — church in Idaho, United States
•Morris Hill Cemetery Mausoleum — mausoleum in Morris Hill Cemetery, Boise, Idaho
Doable as a same-day drive at 5h 26m. Total distance: 333 miles.
Family Friendly
Moderate complexity with 1 natural rest stops along the way.
Solo Traveler
5h 26m drive, comfortable solo distance.
First-Time Driver
Mostly highway driving (19%). 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 166.5 miles on Vietnam Veterans Memorial Highway. The full list of main roads is in the Roads section above.
Yes — we found about 19 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 19 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 329.1 miles (US 20; US 26 / Idaho Medal of Honor Highway): Exit ramp - move to the correct lane early. 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 5.4 hours each way, a round trip means 10.9 hours of driving — that is an unsafe level of fatigue for most drivers. Plan at least one night at Boise, ID before the return drive.
