Summers are dry statewide. NOAA calls the southern deserts some of the nation’s hottest and driest areas
Tires: sharp rock, deep sand and the chain law
California asks three different things of a tire. On Death Valley backcountry roads the Park Service says to fit off-road tires rather than highway or street tires and to carry a plug kit, a 12-volt compressor and a lug wrench, and it calls flats very common on the Racetrack. In Anza-Borrego many roads cross washes of deep sand that need four-wheel drive and the ability to air down.
Winter adds the law. Under a Caltrans R-2 control only a four-wheel or all-wheel drive with snow-tread tires on all four wheels is exempt from chains, and a snow-tread tire is one stamped MS, M/S, M+S or MUD AND SNOW. Under R-3 there are no exceptions at all.
Tires are the only part of the vehicle that touches the ground, and on a loaded rig they work close to their limits. A good tire shop starts with load rating and size, then tread. It will also tell you when the tire you want will rub, need different wheels or throw off your gearing.
Expect help with
01Choosing a tire by load, terrain and season
02Wheels with the right offset and load rating
03Mounting, balancing and tire pressure sensors
04A matching full-size spare
05Alignment, rotation and repairs
How to choose tires for overland travel
Tread pattern is the last decision, not the first.
01Match the load rating to your real axle weights, not to the badge on the fender.
02All-terrain tires suit most overland travel. Mud-terrains are louder, heavier and wear faster, and earn it only in real mud and rock.
03Buy five. A matching full-size spare that you rotate in is worth the money when the nearest tire shop is a day away.
04Check the wheels too. Wheels have load ratings, and the wrong offset stresses bearings and rubs.
05Ask whether the shop can move or reprogram your tire pressure sensors.
What to have ready before you ask for a quote
A tire quote is quick when the shop knows what the tire has to carry.
01Vehicle, current tire size and wheel size
02Lift height, if any
03Loaded weight, or a list of what is on the vehicle
04Where you drive most: pavement, gravel, rock, sand, snow
05A budget range for five tires
Questions people ask
What does load range mean?
It describes how much weight a tire can carry at a given pressure. Heavier builds, vans and truck campers usually need a higher load range than the vehicle came with. The tire's sidewall and the placard in the door jamb are the places to start, and a tire shop can work through the numbers with you.
How big can I go?
Every platform has a size that fits at stock height, a size that fits with a modest lift, and a size that needs trimming and gears. Tell the shop your lift and wheels and ask what fits without rubbing at full steering lock and full compression.
Should I air down?
On washboard, sand and rock, lower pressure gives a better ride and more traction and is easier on the vehicle. It also means you need a way to air back up before pavement. How low depends on your tire, your weight and your speed, so ask your tire shop and start conservatively.
How high is California?
From Brawley at -113 feet to Mount Whitney at 14,494.
Altitude decides what your engine, your brakes and your lungs have to work with, and how late in the year the passes open.
-2,00002,0004,0006,0008,00010,00012,00014,000
Feet above sea level
Towns
Lee ViningOn US 395 at the eastern foot of Tioga Pass. When Tioga Road is closed there is no way to drive into Yosemite from this side of the Sierra.6,790 ft
AlturasOn US 395 in Modoc County. CA 299 leaves US 395 five miles north of town for Cedarville, where the Surprise Valley byway begins and ends.4,372 ft
SusanvilleOn US 395 in the northeast. BLM Eagle Lake Field Office and a Lassen National Forest office cover the ground east and south of here.4,194 ft
BishopThe largest town in the Owens Valley, on US 395. BLM Bishop Field Office and an Inyo National Forest office. Dispersed camping inside this field office is capped at 14 days a year.4,145 ft
Big PineOn US 395. The Forest Service calls it the nearest food, water or fuel to the Ancient Bristlecone Pine Forest. Big Pine Road east from here reaches Eureka Valley and Death Valley.3,988 ft
Lone PineOn US 395 below Mount Whitney. Movie Road into the Alabama Hills leaves Whitney Portal Road west of the stoplight, and the Eastern Sierra Visitor Center sits south of town.3,727 ft
KernvilleOn the Kern River. The Sequoia National Forest’s Kern River Ranger District office is here, near the west end of Sherman Pass Road.2,647 ft
RidgecrestBLM Ridgecrest Field Office, between the southern Sierra and the Mojave. The usual base for the Panamint and Searles country and the southwest corner of Death Valley.2,294 ft
BarstowWhere I-15 meets I-40. BLM Barstow Field Office and the headquarters of Mojave National Preserve. The natural place to service a vehicle before the desert.2,174 ft
BakerOn I-15 where Kelbaker Road heads south into Mojave National Preserve. The Park Service lists Baker as one of the nearest gas stations and says there is none inside the preserve.932 ft
Borrego SpringsRinged by Anza-Borrego Desert State Park, with the park visitor center at the west end of Palm Canyon Drive. Named an International Dark Sky Community.589 ft
NeedlesOn I-40 beside the Colorado River. BLM Needles Field Office, and the eastern approach to the Mojave Road by way of Piute Spring.495 ft
BakersfieldWhere CA 58 meets CA 99. BLM Bakersfield Field Office, which manages the Carrizo Plain National Monument to the west. Last full services before the plain.404 ft
BlytheOn I-10 at the Arizona line. The Bradshaw Trail is reached by driving west on I-10 to the Wiley’s Well exit and south past Wiley’s Well Campground.268 ft
Shelter CoveThe road end on the Lost Coast, about 22 miles from US 101 at Redway. King Peak Road and the other King Range back roads climb inland from the road that brought you here.144 ft
BrawleyBelow sea level in the Imperial Valley. CA 78 runs east from here to the Imperial Sand Dunes; the BLM’s El Centro Field Office is south.-113 ft
Passes, high roads and summits
Mount WhitneyThe highest point in California and in the lower 48. No road to the top14,494 ft
Telescope PeakThe highest point in Death Valley National Park, above Badwater Basin11,049 ft
Patriarch GroveBristlecone Pine Forest Scenic Byway: US 395 at Big Pine, by CA 168 and White Mountain Road, to Patriarch Grove in the White Mountains11,000 ft
Tioga PassTioga Road: Crane Flat in Yosemite to Tioga Pass and US 395 at Lee Vining9,945 ft
Sherman PassSherman Pass Road: The North Fork of the Kern River west of the pass to US 395 and the high desert in the east9,200 ft
North PassSaline Valley Road: CA 190 in the south and Big Pine Road in the north, through Saline Valley7,200 ft
Red PassTitus Canyon Road: Nevada Highway 374, the Daylight Pass Road, two miles east of the park boundary, west into Death Valley5,250 ft
King PeakThe highest point in the King Range, three miles from the Pacific4,088 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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