Iona to Nampa is 306.8 miles and takes about 5 hours 6 minutes via Vietnam Veterans Memorial Highway and I 86, with a fuel budget near $48 and enough daylight to finish in a day. This trip stays within the Mountain West region, moving from one part of Idaho to another. Expect a drive that's mostly on surface roads, offering a more grounded perspective of the landscape. It's a straightforward, single-day option if you're looking for an efficient way to cover ground between these two points in Idaho.
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
153.4 miles from Iona, ID
A natural place for your longest stop of the day
, about 2h 32m 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
East Iona Road
4.6 mi
8m
Rigby Highway
2 mi
2m
Garrity Boulevard
1.4 mi
2m
East Amity Avenue
1.2 mi
2m
South Kings Road
1.1 mi
2m
Longest stretch:
Vietnam Veterans Memorial Highway
— 183 mi, about 2h 55m
Traffic on I-84
Hour-of-day weekday pattern from 262 FHWA count stations on your route.
Peak
4 PM
~2,794 veh/hr typical
· worst 3,281
Quietest
2 AM
~190 veh/hr
Peak-to-quiet ratio
14.7×
busier at peak than in the quiet hours
12a6anoon6p11p
Averaged across 104 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 Iona, ID and Nampa, ID.
1
Start on Olson Avenue
424 ft·20 sec·Olson Avenue
2
Turn right onto East Iona Road
0.6 mi·1 min·East Iona Road
3
Enter roundabout onto East Iona Road
129 ft·2 sec·East Iona Road
4
Continue on East Iona Road
2.0 mi·3 min·East Iona Road
5
Enter roundabout onto East Iona Road
107 ft·1 sec·East Iona Road
6
Continue on East Iona Road
2.0 mi·3 min·East Iona Road
7
At end of road, turn right onto US 20 BUS
0.2 mi·27 sec·North 5th East
8
Take the ramp
0.3 mi·42 sec
9
Merge onto US 20
2.0 mi·2 min·Rigby Highway
10
Merge onto US 20
0.1 mi·14 sec·Grandview Drive
11
Take the exit onto US 20
0.3 mi·36 sec·US 20
Toward I 15 South: Arco, Pocatello
12
Merge onto I 15; US 20
47 mi·44 min·Veterans Memorial Highway
13
Take the exit
0.6 mi·43 sec
Exit 72Toward I 86 West: Chubbuck, Twin Falls
14
Continue on I 86
63 mi·59 min·I 86
15
Continue on I 84; US 30
183 mi·2 hr 55 min·Vietnam Veterans Memorial Highway
Use the straight / slight right lanes.
16
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.
17
Turn left onto I 84 Business
1.4 mi·2 min·Garrity Boulevard
18
Turn left onto North Kings Road
0.8 mi·1 min·North Kings Road
Use the left lane.
19
Enter roundabout onto South Kings Road
125 ft·2 sec·South Kings Road
20
Continue on South Kings Road
1.0 mi·2 min·South Kings Road
21
Turn right onto East Amity Avenue
1.2 mi·2 min·East Amity Avenue
22
Continue on Diamond Street
0.2 mi·15 sec·Diamond Street
23
Continue on East Colorado Avenue
0.2 mi·35 sec·East Colorado Avenue
24
Turn left onto Holly Street
0.3 mi·44 sec·Holly Street
25
Continue on Sunny Ridge Road
1.0 mi·2 min·Sunny Ridge Road
26
Turn right onto Stony Meadow Drive
187 ft·8 sec·Stony Meadow Drive
27
Arrive at destination
Stony Meadow Drive
Trip Plan
Given the 5-hour drive time, you can comfortably complete this trip in one day. Aim to depart in the morning to maximize daylight and allow for a relaxed pace. The longest stretch on Vietnam Veterans Memorial Highway is 183 miles, so plan your first fuel stop before you hit that segment, or shortly after, to ensure you're well-supplied. With only one recommended stop, you have flexibility in choosing where to take a break, but consider stopping around the halfway point to stretch your legs and grab a snack.
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 153.4 miles from Iona, ID, or about 2h 32m 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 67 miles or 1h 10m in
Use this first pause for coffee, a restroom break, and a quick traffic check ahead.
Halfway reset
Around 153.4 miles or 2h 32m 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 Nampa, ID than in the middle of the route.
Before You Leave
+
Open the route before leaving Iona, 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 Iona, ID
This is one driving day of about 306.8 miles and 5h 6m.
Your first comfortable stop window is around 67 miles from Iona, 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 17
5 decision points cluster between mile 0.6 and 300.4 — GPS handles the exact turns, but know they're coming. Your lane choice matters more than the turn itself.
5
0.6 mi into trip|~1m in|East Iona Road
Enter roundabout onto East Iona Road
Roundabout - know your exit number before entering
5
2.6 mi into trip|~5m in|East Iona Road
Enter roundabout onto East Iona Road
Roundabout - know your exit number before entering
6
7.3 mi into trip|~13m 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
54 mi into trip|~57m 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
300.4 mi into trip|~4h 52m 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...
Fuel & Cost
Regular Gas
$55.26 one way
$110.52 round trip
$4.58/gal25.4 MPG avg107 kg CO2
Fuel Type
$/gal
One Way
Round Trip
midgrade
$4.78
$57.71
$115.42
premium
$5.11
$61.67
$123.35
diesel
$6.18
$74.63
$149.27
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: 107.3 kg one way.
Prices: EIA weekly data, 2026-10-12.
Driving Electric?
About $32 in charging
· 1 stop
· 66% less CO2
Vehicle Type
kWh
Stops
DC Fast
Home Charge
Average EV
92
1
$32.21
$14.73
Efficient EV
76.7
0
$26.85
$12.27
EV Truck/SUV
122.7
1
$42.95
$19.64
Gas CO2
107 kg
EV CO2
36 kg (66% 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 Oct 19, 2026
Origin
Iona, ID
Night
in Iona on Monday
Local time
11:26 PM
MDT
Current temp
39°F
Clear
ESE 6 mph0% chanceLive forecast
Destination
Nampa, ID
Night
in Nampa on Monday
Local time
11:26 PM
MDT
Current temp
44°F
Mostly Clear
SSE 5 to 8 mph0% chanceLive 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
5 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 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.
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...
7 mi from route
~18 min detour
Free
near mile 190.4
Park data from the National Park Service API. Alerts update every 2 hours.
More Details
What kind of drive is this?
This route covers 306.8 miles with 21% on highways. You'll experience about 183 miles on Vietnam Veterans Memorial Highway before transitioning to other roads. The majority of your drive will be on surface roads, which often means you'll notice more local traffic and a generally slower pace compared to interstate travel. Expect a less intense driving experience with fewer high-speed merges.
Only 21% highway — the rest is turn-by-turn surface driving.
27 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 17 points where you need to pay attention to lane position or signs. The trickiest moment comes around 0.6 miles in near East Iona Road.
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 306.8 miles you will encounter 17 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 0.6 miles (East Iona Road): Roundabout - know your exit number before entering; at 2.6 miles (East Iona Road): Roundabout - know your exit number before entering; at 7.3 miles (US 20): Exit ramp - move to the correct lane early. Multiple destination signs - pick the right one.
Elevation Profile
Gently rolling terrain
4,784 ft2,520 ft
Total Climb
758 ft
Total Descent
3,022 ft
Highest Point
4,784 ft
Elevation Range
2,264 ft
Notable High Points
4,421 ft at ~101.3 miles+117 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 Iona, ID to Nampa, ID, road signs begin pointing toward Twin Falls along the way.
Doable as a same-day drive at 5h 6m. Total distance: 306.8 miles.
Family Friendly
Moderate complexity with 1 natural rest stops along the way.
Solo Traveler
5h 6m drive, comfortable solo distance.
First-Time Driver
Mostly highway driving (21%). 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 0.6 miles (East Iona Road): Roundabout - know your exit number before entering; at 2.6 miles (East Iona Road): Roundabout - know your exit number before entering; at 7.3 miles (US 20): 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 5.1 hours each way, a round trip means 10.2 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.
