The drive from Nampa, ID to Fremont County, ID covers 364.4 miles and takes about 6h 16m behind the wheel.
This route is realistic as a one-day drive if you keep your stops efficient.
The route leans on Vietnam Veterans Memorial Highway, I 86, I 15 BUS for much of the mileage,
and the overall profile is mixed highway & surface.
The longest uninterrupted segment is about 183.1 miles on Vietnam Veterans Memorial Highway.
At current regular gas prices, budget about $57.74 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
182.2 miles from Nampa, ID
A natural place for your longest stop of the day
, about 3h 1m into the drive
.
Main Roads
Road
Distance
Duration
Vietnam Veterans Memorial Highway
183.1 mi
2h 55m
I 86
62.7 mi
59m
I 15 BUS
46.3 mi
43m
Idaho Medal of Honor Highway
40.9 mi
45m
Yellowstone Highway
17.2 mi
18m
South Antelope Flat Road
4.3 mi
16m
Rigby Highway
3.1 mi
3m
Garrity Boulevard
1.8 mi
3m
Longest stretch:
Vietnam Veterans Memorial Highway
— 183.1 mi, about 2h 55m
Turn-by-Turn Driving Directions
Step-by-step road directions between Nampa, ID and Fremont County, ID.
1
Start on Stony Meadow Drive
183 ft·13 sec·Stony Meadow Drive
2
Turn left onto Sunny Ridge Road
1.0 mi·2 min·Sunny Ridge Road
3
Continue on Holly Street
0.3 mi·44 sec·Holly Street
4
Continue on East Bird Avenue
0.2 mi·25 sec·East Bird Avenue
5
Continue on Fern Street
0.3 mi·37 sec·Fern Street
6
Continue on East Sheridan Avenue
0.1 mi·16 sec·East Sheridan Avenue
7
Continue on Holly Street
0.3 mi·46 sec·Holly Street
8
Continue on 16th Avenue South
0.7 mi·1 min·16th Avenue South
9
Continue on 16th Avenue Overpass
0.1 mi·15 sec·16th Avenue Overpass
10
Continue on 16th Avenue North
0.8 mi·1 min·16th Avenue North
Use the right lane.
11
Turn right onto I 84 Business
1.8 mi·3 min·Garrity Boulevard
12
Take the ramp onto I 84 Business
0.4 mi·25 sec·I 84 Business
Toward I 84 East: Meridian, BoiseUse the straight / right lanes.
13
Merge onto I 84; US 30; ID 55
11 mi·12 min·Vietnam Veterans Memorial Highway
Use the straight / slight right lanes.
14
Keep slight right at fork onto I 84; US 30
172 mi·2 hr 42 min·Vietnam Veterans Memorial Highway
Use the slight right lane.
15
Continue on I 86; US 30
63 mi·59 min·I 86; US 30
16
Keep slight left at fork
0.6 mi·40 sec
Toward Idaho Falls
17
Merge onto I 15 BUS
46 mi·43 min·I 15 BUS
18
Take the exit onto US 20
0.3 mi·35 sec·US 20
Exit 119Toward US 20 East, I 15: Rigby, West Yellowstone
19
Continue on US 20
3.1 mi·3 min·Rigby Highway
Use the right lane.
20
Continue on US 20
15 mi·16 min·Idaho Medal of Honor Highway
21
Continue on US 20
17 mi·18 min·Yellowstone Highway
22
Continue on US 20
25 mi·28 min·Idaho Medal of Honor Highway
23
Turn left onto South Antelope Flat Road
4.3 mi·16 min·South Antelope Flat Road
24
Arrive at destination
South Antelope Flat Road
Trip Plan
Morning Departure
Start early — leave by 6-7 AM to arrive at a reasonable hour.
Evening Departure
This is a long drive — plan for a morning departure or consider splitting it into two days.
You can normally do this drive in one day.
Plan roughly 1 meaningful break for fuel, food, and rest.
The halfway point lands around 182.2 miles from Nampa, ID, or about 3h 1m into the drive.
The longest continuous stretch on this route runs about 183.1 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 80 miles or 1h 24m in
Use this first pause for coffee, a restroom break, and a quick traffic check ahead.
Halfway reset
Around 182.2 miles or 3h 1m 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 58m
Traffic, exits, and arrival timing usually matter more near Fremont County, ID than in the middle of the route.
Before You Leave
+
Open the route before leaving Nampa, 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 Nampa, ID
This is one driving day of about 364.4 miles and 6h 16m.
Your first comfortable stop window is around 80 miles from Nampa, 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 183.1 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 8
5 decision points cluster between mile 5.5 and 298.6 — GPS handles the exact turns, but know they're coming. Your lane choice matters more than the turn itself.
6
5.5 mi into trip|~12m in|I 84 Business
Take the ramp onto I 84 Business toward I 84 East: Meridian, Boise
Lane positioning matters here. Multiple destination signs - pick the right one
Use the straight / right lanes.
Toward I 84 East: Meridian, Boise
5
5.9 mi into trip|~12m in|I 84; US 30; ID 55 / Vietnam Veterans Memorial Highway
Merge onto I 84; US 30; ID 55 / Vietnam Veterans Memorial Highway
Merge point - match speed before joining. Lane positioning matters here
Use the straight / slight right lanes.
6
16.7 mi into trip|~25m in|I 84; US 30 / Vietnam Veterans Memorial Highway
Keep slight right at fork onto I 84; US 30 / Vietnam Veterans Memorial Highway
Highway fork - watch signs carefully. Lane positioning matters here
Use the slight right lane.
5
251.7 mi into trip|~4h 7m in
Keep slight left at fork toward Idaho Falls
Highway fork - watch signs carefully
Toward Idaho Falls
6
298.6 mi into trip|~4h 51m in|US 20
Take the exit onto US 20 toward US 20 East, I 15: Rigby, West Yellowstone
Exit ramp - move to the correct lane early. Multiple destination signs - pick the right one
Exit 119
Toward US 20 East, I 15: Rigby, West Yellowston...
Fuel & Cost
Regular Gas
$57.74 one way
$115.49 round trip
$4.03/gal25.4 MPG avg128 kg CO2
Fuel Type
$/gal
One Way
Round Trip
midgrade
$4.22
$60.53
$121.06
premium
$4.53
$65.00
$130.01
diesel
$5.61
$80.45
$160.91
No toll roads detected on this route.
Estimated Trip Cost (one way, 1 person)
Fuel
$58
Meals
$25–$50
Total
$83–$108
Rough estimate based on US averages. Hotel $80–$140/night, meals $25–$50/day.
Estimated CO2 emission: 127.5 kg one way.
Prices: EIA weekly data, 2026-04-13.
Driving Electric?
About $38 in charging
· 1 stop
· 66% less CO2
Vehicle Type
kWh
Stops
DC Fast
Home Charge
Average EV
109.3
1
$38.26
$17.49
Efficient EV
91.1
1
$31.88
$14.58
EV Truck/SUV
145.8
1
$51.02
$23.32
Gas CO2
127 kg
EV CO2
43 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 Apr 15, 2026
Origin
Nampa, ID
Afternoon
in Nampa on Saturday
Local time
2:21 PM
MDT
Current temp
59°F
Unavailable
Live forecast
Destination
Fremont County, ID
Afternoon
in Fremont County on Saturday
Local time
2:21 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
Very similar conditions
Both ends of the route are sitting at about the same temperature right now.
Road read
6h 16m on the road
Start early — leave by 6-7 AM to arrive at a reasonable hour.
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
~17 min detour
Free
near mile 113.1
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?
364.4 mi in 6h 16m — 30% highway, the rest on surface roads. Biggest road: Vietnam Veterans Memorial Highway.
30% highway, the rest on surface roads — varied driving throughout.
24 navigation steps total — most of the decisions cluster near the start and finish.
Longest single stretch: 183.1 mi on Vietnam Veterans Memorial Highway.
How Hard Is This Drive?
6/10
This route mixes highway mileage with some local-road sections near the start or finish. You will hit about 8 points where you need to pay attention to lane position or signs. The trickiest moment comes around 5.5 miles in near I 84 Business.
Driving Effort6/10
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 364.4 miles you will encounter 8 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 5.5 miles (I 84 Business): Lane positioning matters here. Multiple destination signs - pick the right one; at 5.9 miles (I 84; US 30; ID 55 / Vietnam Veterans Memorial Highway): Merge point - match speed before joining. Lane positioning matters here; at 16.7 miles (I 84; US 30 / Vietnam Veterans Memorial Highway): Highway fork - watch signs carefully. Lane positioning matters here.
Towns Mentioned on Route Signs
Based on OSRM destination-sign hints, not a full list of every settlement the road passes.
Between Nampa, ID and Fremont County, ID, road signs point toward Idaho Falls and Yellowstone.
Idaho Falls
251.7 mi in|~4h 7m
Yellowstone
298.6 mi in|~4h 51m|via US 20
Who Is This Route For?
Weekend Trip
Doable as a same-day drive at 6h 16m. Total distance: 364.4 miles.
Family Friendly
Moderate complexity with 1 natural rest stops along the way.
Solo Traveler
6h 16m drive, plan rest stops for pacing.
Scenic Drive
Mixed highway & surface route profile with national parks nearby.
Frequently Asked Questions
The longest stretch is about 183.1 miles on Vietnam Veterans Memorial Highway. 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 Fremont County, ID 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 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 5.5 miles (I 84 Business): Lane positioning matters here. Multiple destination signs - pick the right one; at 5.9 miles (I 84; US 30; ID 55 / Vietnam Veterans Memorial Highway): Merge point - match speed before joining. Lane positioning matters here; at 16.7 miles (I 84; US 30 / Vietnam Veterans Memorial Highway): Highway fork - watch signs carefully. Lane positioning matters here.
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 6.3 hours each way, a round trip means 12.6 hours of driving — that is an unsafe level of fatigue for most drivers. Plan at least one night at Fremont County, ID before the return drive.
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, and NPS for national parks. See our methodology for refresh cadence and limitations.
