Tyhee, ID to Boise, ID is 234.7 miles and takes about 3h 47m via Vietnam Veterans Memorial Highway and I 86, with a fuel budget near $38 and enough daylight to finish in a day. This drive stays within the Mountain West region, moving from one part of Idaho to another. It's a relatively short trip, so you can expect a straightforward drive without too many complex navigation challenges. Plan for a day trip, using the shorter duration to your advantage for flexibility.
Trip Pace
Same-day drive is realistic
A same-day return is realistic if you keep stops short.
Break Rhythm
1 planned break
A short stop every 2 to 3 hours is enough for this drive.
Midpoint
117.4 miles from Tyhee, ID
A natural place for your longest stop of the day
, about 1h 52m into the drive
.
Main Roads
Road
Distance
Duration
Vietnam Veterans Memorial Highway
166.5 mi
2h 36m
I 86
61.5 mi
57m
South Broadway Avenue
2.9 mi
5m
Yellowstone Avenue
2 mi
3m
North Yellowstone Highway
0.6 mi
<1m
East Front Street
0.6 mi
1m
Idaho Medal of Honor Highway
0.3 mi
<1m
Cherry Lane
<0.1 mi
<1m
Longest stretch:
Vietnam Veterans Memorial Highway
— 166.5 mi, about 2h 36m
Traffic on I-84
Hour-of-day weekday pattern from 58 FHWA count stations on your route.
Peak
4 PM
~1,328 veh/hr typical
· worst 1,630
Quietest
2 AM
~115 veh/hr
Peak-to-quiet ratio
11.5×
busier at peak than in the quiet hours
12a6anoon6p11p
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 Tyhee, ID and Boise, ID.
1
Start on Cherry Lane
50 ft·7 sec·Cherry Lane
2
Turn left onto US 91
0.6 mi·56 sec·North Yellowstone Highway
3
Continue on US 91
2.0 mi·3 min·Yellowstone Avenue
4
Take the ramp
0.3 mi·41 sec
5
Merge onto I 86
61 mi·57 min·I 86
6
Continue on I 84; US 30
166 mi·2 hr 36 min·Vietnam Veterans Memorial Highway
7
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
8
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.
9
Turn right onto US 20; US 26
2.9 mi·5 min·South Broadway Avenue
Use the straight / left / right lanes.
10
Turn left onto US 20; US 26
0.6 mi·1 min·East Front Street
11
Turn right
55 ft·4 sec
12
Arrive at destination
Trip Plan
Given the 3h 47m estimated drive time, leaving Tyhee in the morning will allow you to reach Boise with plenty of daylight. With only one recommended stop, you have flexibility in pacing your trip. Pay attention to the transition from highway to surface roads, as this is where speeds and traffic can change significantly. Budgeting around $38 for fuel should cover the 234.7-mile distance, but always check current prices before you depart.
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 117.4 miles from Tyhee, ID, or about 1h 52m 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 52 miles or 51m in
Use this first pause for coffee, a restroom break, and a quick traffic check ahead.
Halfway reset
Around 117.4 miles or 1h 52m in
This is the best place for your longest stop, a real meal, and a full fuel check.
Final approach
Final hour starts around 3h 2m
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 Tyhee, 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 Tyhee, ID
This is one driving day of about 234.7 miles and 3h 47m.
Your first comfortable stop window is around 52 miles from Tyhee, 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 7
5 decision points cluster between mile 0 and 231.2 — GPS handles the exact turns, but know they're coming. Your lane choice matters more than the turn itself.
3
0 mi into trip|~0m in|US 91 / North Yellowstone Highway
Turn left onto US 91 / North Yellowstone Highway
Navigation decision point
3
2.9 mi into trip|~4m in|I 86
Merge onto I 86
Merge point - match speed before joining
6
230.9 mi into trip|~3h 38m 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
231.1 mi into trip|~3h 39m 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
231.2 mi into trip|~3h 39m 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
$36.58 one way
$73.16 round trip
$3.96/gal25.4 MPG avg82 kg CO2
Fuel Type
$/gal
One Way
Round Trip
midgrade
$4.17
$38.56
$77.12
premium
$4.47
$41.34
$82.68
diesel
$4.80
$44.32
$88.63
No toll roads detected on this route.
Estimated Trip Cost (one way, 1 person)
Fuel
$37
Meals
$25–$50
Total
$62–$87
Rough estimate based on US averages. Hotel $80–$140/night, meals $25–$50/day.
Estimated CO2 emission: 82.1 kg one way.
Prices: EIA weekly data, 2026-07-13.
Driving Electric?
About $25 in charging
· 0 stops
· 67% less CO2
Vehicle Type
kWh
Stops
DC Fast
Home Charge
Average EV
70.4
0
$24.64
$11.27
Efficient EV
58.7
0
$20.54
$9.39
EV Truck/SUV
93.9
1
$32.86
$15.02
Gas CO2
82 kg
EV CO2
27 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 Jul 18, 2026
Origin
Tyhee, ID
Late night
in Tyhee on Sunday
Local time
4:35 AM
MDT
Current temp
92°F
Sunny then Isolated Showers And Thunderstorms
NW 2 to 6 mph16% chanceLive forecast
Special Weather Statement
Special Weather Statement issued July 18 at 9:37AM MDT by NWS Boise ID
Destination
Boise, ID
Late night
in Boise on Sunday
Local time
4:35 AM
MDT
Current temp
101°F
Patchy Smoke
W 2 to 8 mph1% chanceLive forecast
Special Weather Statement
Special Weather Statement issued July 18 at 9:37AM MDT by NWS Boise 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
9 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
3h 47m on the road
The weather snapshot is not static. If you are leaving later, give both cities one more quick forecast check before departure.
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 137.6
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?
This route is primarily surface roads, with only 26% on highways. You'll experience your longest stretch of highway at 166.5 miles on Vietnam Veterans Memorial Highway. Expect to transition from highway cruising to surface road driving, which often means more local traffic and varied speed limits. The shift from highway to surface roads will be noticeable as you approach your destination.
Only 26% highway — the rest is turn-by-turn surface driving.
12 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?
3/10
Expect a hands-on drive with frequent turns and local roads rather than long highway stretches. There are only a few real navigation decisions along the way. The trickiest moment comes early in the drive near US 91 / North Yellowstone Highway.
Driving Effort3/10
Easy - simple navigation with a manageable amount of wheel time
Balances navigation complexity with total wheel time.
This is a straightforward 3h 47m drive. You will face about 7 decision points, but nothing that requires special attention if you follow navigation.
Where does it get tricky?
The main spots that need attention: near the start (US 91 / North Yellowstone Highway): Navigation decision point; at 2.9 miles (I 86): Merge point - match speed before joining; at 230.9 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.
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
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 15 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.
Yes, with realistic expectations. Build in a stop roughly every 2 hours, have snacks and activities ready, and check the Nearby Places tabs for kid-friendly stops along the way.
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: near the start (US 91 / North Yellowstone Highway): Navigation decision point; at 2.9 miles (I 86): Merge point - match speed before joining; at 230.9 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.
Possible but tiring. At 3.8 hours each way, an in-and-out day trip would put you behind the wheel for 7.6 hours — manageable with a long break at Boise, ID, but most travelers stay overnight.
