The drive from Lewiston, ID to Challis, ID covers 374.7 miles and takes about 8h 25m behind the wheel.
It usually feels better as a 2-day road trip than as one long push.
The route leans on US 95, Salmon River Scenic Byway, South 3rd Street for much of the mileage,
and the overall profile is mixed drive.
The longest uninterrupted segment is about 135 miles on US 95.
At current regular gas prices, budget about $59.38 one way before food or hotel costs.
Trip Pace
Best split across 2 days
Treat the return leg as its own travel day rather than an afterthought.
Break Rhythm
2 planned breaks
Plan on a short reset every 3 to 4 hours to stay fresh behind the wheel.
Midpoint
187.3 miles from Lewiston, ID
A natural place for your longest stop of the day
, about 3h 52m into the drive
.
Who Is This Route For?
Family Friendly
Moderate complexity with 2 natural rest stops along the way.
Mixed drive route profile with national parks nearby.
Drive Character
The drive from Lewiston, ID to Challis, ID covers 374.7 miles and takes about 8h 25m, using a mix of highways and local roads.
Expect a mix of faster highway mileage and slower local approaches near the beginning or end.
There are about 25 navigation steps in the underlying route data, so the final approach matters more than the middle miles.
US 95 is the longest continuous segment at about 135 miles.
How Hard Is This Drive?
This route mixes highway mileage with some local-road sections near the start or finish. There are only a few real navigation decisions along the way. The trickiest moment comes early in the drive near Idaho Street.
Driving Effort4/10
Easy - simple navigation with a manageable amount of wheel time
Balances navigation complexity with total wheel time.
The route itself is not hard, but at 8h 25m, endurance matters. Plan breaks every 2-3 hours. The 17 decision points are all manageable with basic attention.
Where does it get tricky?
The main spots that need attention: near the start (Idaho Street): Navigation decision point; at 0.7 miles (7th Avenue): Navigation decision point; at 0.9 miles (21st Street): Navigation decision point.
Critical Maneuvers
5 of 17 key points
These are the spots where you need to pay the most attention. Preview them before you drive.
4
0 mi into trip|~0m in|Idaho Street
Turn right onto Idaho Street
Navigation decision point
5
0.7 mi into trip|~2m in|7th Avenue
Turn left onto 7th Avenue
Navigation decision point
5
0.9 mi into trip|~2m in|21st Street
At end of road, turn left onto 21st Street
Navigation decision point
8
1.9 mi into trip|~4m in|US 12
Keep slight right at fork onto US 12 toward US 95 South: Missoula, Boise
Highway fork - watch signs carefully. Lane positioning matters here. Multiple destination signs - pick the right one
Use the straight lane.
Toward US 95 South: Missoula, Boise
4
69.8 mi into trip|~1h 24m in|Johnston Road
Turn right onto Johnston Road
Navigation decision point
Main Roads
Road
Distance
Duration
US 95
135 mi
2h 35m
Salmon River Scenic Byway
54.9 mi
1h 21m
South 3rd Street
45.6 mi
1h 1m
Banks Lowman Road
33.3 mi
58m
Ponderosa Pine Scenic Route
32.8 mi
44m
ID 55
29 mi
41m
State Highway 21
24.4 mi
28m
US 12
10.3 mi
13m
Longest stretch:
US 95
— 135 mi, about 2h 35m
Turn-by-Turn Driving Directions
Step-by-step road directions between Lewiston, ID and Challis, ID.
1
Start on this road
105 ft·9 sec·this road
2
Turn right onto Idaho Street
0.7 mi·1 min·Idaho Street
3
Turn right onto 19th Street
288 ft·18 sec·19th Street
4
Turn left onto 7th Avenue
0.1 mi·30 sec·7th Avenue
5
At end of road, turn left onto 21st Street
339 ft·10 sec·21st Street
6
Continue on US 12
1.0 mi·2 min·US 12
7
Keep slight right at fork onto US 12
9.3 mi·11 min·US 12
Toward US 95 South: Missoula, BoiseUse the straight lane.
8
Continue on US 95
59 mi·1 hr 8 min·US 95
9
Turn right onto Johnston Road
2.2 mi·5 min·Johnston Road
10
Turn right onto US 95
76 mi·1 hr 26 min·US 95
11
Turn left onto ID 55
11 mi·16 min·ID 55
12
Turn right onto Boydstun Street
0.9 mi·1 min·Boydstun Street
13
Continue on East Deinhard Lane
1.6 mi·2 min·East Deinhard Lane
14
Turn right onto ID 55
46 mi·1 hr 1 min·South 3rd Street
15
Continue on ID 55
18 mi·25 min·ID 55
16
Turn left onto Banks Lowman Road
33 mi·58 min·Banks Lowman Road
17
Turn left onto ID 21
33 mi·44 min·Ponderosa Pine Scenic Route
18
Continue on ID 21
24 mi·28 min·State Highway 21
19
Continue on ID 21
1.0 mi·2 min·Eva Falls Avenue
20
At end of road, turn left onto ID 75
55 mi·1 hr 21 min·Salmon River Scenic Byway
21
At end of road, turn left onto US 93
2.1 mi·3 min·South Salmon River Scenic Byway
22
Turn left onto East Valley Avenue
0.4 mi·1 min·East Valley Avenue
23
Turn right onto South 7th Street
330 ft·16 sec·South 7th Street
24
Turn right
135 ft·9 sec
25
Arrive at destination
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.
This drive is better paced as a 2-day trip.
Plan roughly 2 meaningful breaks for fuel, food, and rest.
The halfway point lands around 187.3 miles from Lewiston, ID, or about 3h 52m into the drive.
The longest continuous stretch on this route runs about 135 miles.
Consider an overnight stop or starting very early.
Departure
Before you leave
Start with fuel, water, and navigation already sorted so the first hour feels easy.
First stop
Around 82 miles or 1h 41m in
Use this first pause for coffee, a restroom break, and a quick traffic check ahead.
Halfway reset
Around 187.3 miles or 3h 52m in
This is the best place for your longest stop, a real meal, and a full fuel check.
Overnight split
Day 1 wrap after about 187.3 miles or 3h 52m
Stop before fatigue turns the last few hours into a grind. You want day two to start fresh, not just resumed.
Final approach
Final hour starts around 6h 54m
Traffic, exits, and arrival timing usually matter more near Challis, ID than in the middle of the route.
Before You Leave
+
Open the route before leaving Lewiston, 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.
+
Pick one backup stop option before the midpoint in case traffic changes your pacing.
+
Treat this as a 2-day road trip and book the overnight stop before the busiest arrival window.
Day 1
Settle into the route from Lewiston, ID
Aim for roughly 187 miles and 4.2 hours of wheel time on this day.
Day 2
Finish the approach into Challis, ID
Aim for roughly 187 miles and 4.2 hours of wheel time on this day.
Your first comfortable stop window is around 82 miles from Lewiston, ID.
This route usually feels better as a 2-day drive than as one long push.
Plan about 2 real breaks rather than only quick fuel stops.
The longest stretch is on US 95 for about 135 miles.
Where to Stop
Rest stops, refuel points, and overnight suggestions along this route.
Halfway Point
Midpoint
About 187.3 mi from Lewiston, ID
· 3h 52m into the drive
The midpoint is around 187.3 miles from Lewiston, ID, which is a good place for a longer meal and fuel stop.
Before the longest stretch
Fuel check
Top up before US 95 if your tank is already low. That segment runs about 135 miles.
Overnight split
Hotel stop
For a steadier pace, wrap day one after about 187 miles or 4.2 hours on the road.
Arriving in Challis, ID
The final approach into Challis, ID usually feels slower than the middle of the drive, so avoid planning your tightest schedule at the very end.
Try to arrive with enough fuel left to skip an immediate station stop unless you already know the area around Challis, ID.
On a multi-day trip, keep the last day a little lighter so you reach Challis, ID with some flexibility left in the schedule.
After long uninterrupted mileage, take five minutes before the last urban segment to reset and refocus on exits, merges, and city traffic.
These stop ideas are pacing suggestions — the exact town or exit can change with traffic, hotel plans, and fuel range.
National Parks Near This Route
Worth a detour if your schedule allows.
Nez Perce National Historical Park
National Historical Park
Since time immemorial, the valleys, prairies, mountains, and plateaus of the inland northwest have been home to the nimíipuu (Nez Perce) people. Extremely resilient, they survived the settling of the...
20 mi from route
~50 min detour
Free
near mile 64.6
Park data from the National Park Service API. Alerts update every 2 hours.
Fuel & Cost
Regular Gas
$59.38 one way
$118.75 round trip
$4.03/gal25.4 MPG avg131 kg CO2
Fuel Type
$/gal
One Way
Round Trip
midgrade
$4.22
$62.24
$124.48
premium
$4.53
$66.84
$133.68
diesel
$5.61
$82.73
$165.46
No toll roads detected on this route.
Estimated Trip Cost (one way, 1 person)
Fuel
$59
Hotel (1n)
$80–$140
Meals
$50–$100
Total
$189–$299
Rough estimate based on US averages. Hotel $80–$140/night, meals $25–$50/day.
Estimated CO2 emission: 131.1 kg one way.
Prices: EIA weekly data, 2026-04-13.
Driving Electric?
About $39 in charging
· 1 stop
· 66% less CO2
Vehicle Type
kWh
Stops
DC Fast
Home Charge
Average EV
112.4
1
$39.34
$17.99
Efficient EV
93.7
1
$32.79
$14.99
EV Truck/SUV
149.9
1
$52.46
$23.98
Gas CO2
131 kg
EV CO2
44 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 17, 2026
Origin
Lewiston, ID
Morning
in Lewiston on Saturday
Local time
8:06 AM
PDT
Current temp
64°F
Unavailable
Live forecast
Destination
Challis, ID
Morning
in Challis on Saturday
Local time
9:06 AM
MDT
Current temp
20°F
Partly Cloudy
SW 2 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.
For long drives, weather on day two can matter just as much as conditions at departure, so check the whole travel window rather than only the first day.
Time zone
1 hour later
The destination clock does not match departure time, so double-check hotel check-in windows and late arrival plans.
Temperature spread
44 degrees cooler at arrival
A meaningful temperature swing is a good cue to rethink layers, water, and how soon you want to arrive.
Road read
8h 25m on the road
This is long enough that the arrival forecast matters almost as much as departure conditions. Recheck both ends before you roll.
Weather data from the National Weather Service. Conditions may change; check closer to your travel date.
Frequently Asked Questions
The drive from Lewiston, ID to Challis, ID covers 374.7 miles and takes about 8h 25m without stops. Add 15-30 minutes for a fuel or rest stop on longer drives.
The main roads are US 95, Salmon River Scenic Byway, South 3rd Street. Expect a mix of highway and local road driving.
Consider an overnight stop or starting very early.
Yes. This route is usually more comfortable as a 2-day drive. A sensible stopping point is after roughly 187 miles on day one.
The midpoint is about 187.3 miles from Lewiston, ID. Look for rest areas, gas stations, or food options near the halfway mark.
At current regular gas prices, expect to spend about $59.38 one way. This estimate uses 25.4 MPG — your actual cost will vary with your vehicle's fuel efficiency and current gas prices.
Start early — leave by 6-7 AM to arrive at a reasonable hour. This is a long drive — plan for a morning departure or consider splitting it into two days.
Plan about 2 meaningful breaks for fuel, food, or rest. Plan on a short reset every 3 to 4 hours to stay fresh behind the wheel.
The route itself is not hard, but at 8h 25m, endurance matters. Plan breaks every 2-3 hours. The 17 decision points are all manageable with basic attention.
The main spots that need attention: near the start (Idaho Street): Navigation decision point; at 0.7 miles (7th Avenue): Navigation decision point; at 0.9 miles (21st Street): Navigation decision point.
The route from Lewiston, ID to Challis, ID does not surface many named destination signs beyond the main corridor.
Yes. Nearby national parks include Nez Perce National Historical Park.
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.
