280 Forest Service, 39 BLM, 7 Army Corps and 3 National Park Service. 220 can be booked ahead
Where four-wheel drive is actually named
Much of Idaho’s documented driving asks for clearance rather than low range. The BLM says most passenger vehicles can manage the Owyhee Uplands byway in summer, that four-wheel drive is not needed on the Main Oregon Trail byway, and that two-wheel drive reaches the Bruneau Canyon Overlook.
Then it names the exceptions: four-wheel drive with clearance from Murphy to the Bruneau overlook, and high-clearance four-wheel drive for the primitive roads in the BLM backcountry at Craters of the Moon. A shop here should talk first about reliability, recovery points and a second spare, because help is a long way from the middle of the Magruder corridor.
A 4x4 shop is where parts become a working vehicle. Most sell and install the major brands, and the better ones will talk you out of parts you do not need. For overland use, ask them to think about reliability and weight rather than looks.
Typical work
01Differential gears and lockers
02Armor: bumpers, sliders and skid plates
03Winch and recovery point installation
04Lift, wheels and tires
05Lighting, compressors and wired accessories
How to choose a 4x4 shop
Ask about the unglamorous work.
01Ask what they drive and where. Shops that travel build differently from shops that only show.
02Ask about differential work specifically if you need gears or lockers. Setting up gears is a skill, and a bad setup is loud and short-lived.
03Ask how they wire accessories: fused, relayed, loomed and labeled, or tapped into whatever was nearby.
04Ask about weight. Every part they sell you is weight you carry forever.
What to have ready before you ask for a quote
Start from the problem, not the part.
01Year, model and drivetrain
02Tire size and any lift
03What you want the vehicle to do that it cannot do now
04What is already installed
05A budget range
Questions people ask
Do I need lockers?
For most dirt-road travel, no. Good tires at the right pressure and careful driving go a long way, and many modern 4x4s have capable traction control. A rear locker becomes worth it when you regularly cross terrain where a wheel leaves the ground.
Winch or no winch?
If you travel alone, a winch is the one recovery tool that does not need a second vehicle. It also needs a bumper that can carry it, a battery that can feed it, and practice. If you always travel with others, traction boards and a rope may be enough.
What should I do first?
Tires, then recovery points and basic recovery gear, then whatever your first few trips tell you is missing. Trips are cheaper than parts and much better at showing you what you need.
How high is Idaho?
From Lewiston at 740 feet to Borah Peak at 12,662.
Altitude decides what your engine, your brakes and your lungs have to work with, and how late in the year the passes open.
02,0004,0006,0008,00010,00012,000
Feet above sea level
Towns
StanleyWhere State Highway 21 meets State Highway 75 in the Sawtooth Valley. The Salmon River and Ponderosa Pine scenic byways both start here, and the Custer Motorway leaves Highway 75 eleven miles east.6,260 ft
KetchumOn State Highway 75 at the south end of the Sawtooth National Recreation Area. The Sawtooth Scenic Byway climbs north from here to Galena Summit.5,844 ft
ArcoWhere US 20, US 26 and US 93 meet. The gateway town for Craters of the Moon National Monument and Preserve and its Loop Road.5,325 ft
ChallisOn the Salmon River Scenic Byway. BLM field office, and the north end of the Custer Motorway past the Land of the Yankee Fork interpretive center.5,246 ft
McCallOn Payette Lake north of Boise, in the Payette National Forest, which reaches east to the Frank Church-River of No Return.5,013 ft
Elk CityEnd of State Highway 14 and of the Elk City Wagon Road. The Forest Service calls it a small, full-service community with fuel; the Magruder corridor starts past Red River.4,011 ft
SalmonHeadquarters of the Salmon-Challis National Forest and a BLM field office. The BLM calls it a full-service community, and the Lewis and Clark Back Country Byway starts at Tendoy, 19 miles south.3,941 ft
Twin FallsOn I-84 above the Snake River canyon. BLM district office, with the Jarbidge Field Office, for the desert south of the highway.3,733 ft
GrangevilleOn US 95 at the edge of the Camas Prairie. State Highway 14 runs east from here toward Elk City and the west end of the Magruder Road Corridor.3,398 ft
BoiseState capital on I-84. BLM Idaho state office and Boise District, with the Four Rivers and Bruneau field offices. State Highway 21, the Ponderosa Pine Scenic Byway, runs from here to Stanley.2,700 ft
MarsingOn the Snake River southwest of Boise. The BLM’s Owyhee Field Office, which looks after the Owyhee Uplands Back Country Byway, is in town.2,297 ft
Coeur d’AleneOn I-90 in the Panhandle. BLM district and field office, and the service town for the Idaho Panhandle National Forests.2,192 ft
SandpointWhere US 95 meets US 2 north of Lake Pend Oreille. Endowment land north of the lake carries a grizzly bear food storage requirement.2,101 ft
RigginsOn US 95 where the Little Salmon meets the Salmon River, between the Payette and Nez Perce-Clearwater national forests and below the Hells Canyon rim.1,806 ft
KamiahOn US 12 beside the Clearwater River. Supervisor’s office for the Nez Perce-Clearwater National Forests and the western approach to the Lolo Motorway.1,239 ft
LewistonWhere US 12 meets US 95 on the Snake River, close to the state’s low point of 710 feet. West end of the Northwest Passage Scenic Byway and a base for Hells Canyon.740 ft
Passes, high roads and summits
Borah PeakThe highest point in Idaho, in Custer County. No road to the top12,662 ft
Galena SummitSawtooth Scenic Byway: Shoshone north through Ketchum to the Sawtooth Valley8,701 ft
Magruder Road CorridorRed River, east of Elk City, to Darby, Montana7,920 ft
Lemhi PassLewis and Clark Back Country Byway and Adventure Road: A loop from Tendoy on State Highway 28, 19 miles south of Salmon7,368 ft
Willow Creek SummitUS 93 between Mackay and Challis, below the west face of Borah Peak7,165 ft
Banner SummitPonderosa Pine Scenic Byway: Stanley to Boise on State Highway 217,056 ft
Pass, road and summit elevations are the figures published by the agency that manages them. Town elevations are the town’s or county’s own
figure where it publishes an exact one; the rest are from the U.S. Geological Survey (3D Elevation Program at the place’s official coordinates),
retrieved September 18, 2026. Every source is listed at the foot of the page.
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