RV travel guide
San Bernardino County
County seat San Bernardino, 20,057 sq mi across California. Everything an RV traveler should read before rolling in — where you can boondock, the roads worth the detour, and the local rule that actually matters.
The county in brief
A traveler's read on San Bernardino County
At 20,057 sq mi, San Bernardino is the largest county by area in the contiguous US — bigger than 9 entire US states — and the diversity inside that footprint runs from 11,503-ft San Gorgonio Peak through the 4,300-ft Big Bear lake-resort tier down to -227 ft below the Salton Sea waterline at the Riverside County line.
The Mojave National Preserve occupies 1.6M acres of the eastern county and is one of the largest contiguous units in the NPS system, with dispersed camping allowed at every signed pullout (14-day stay limit per BLM convention). I-15 to Las Vegas and I-40 to Flagstaff both transit the county on rig-friendly grades; CA-18 Rim of the World above San Bernardino city tops 7,200 ft and is rig-capped at 40 ft by Caltrans.
RV travel intelligence
Read the land before you roll in
The three things that shape an RV trip here — where you can boondock, the roads worth the detour, and the local rule that trips travelers up.
Dispersed camping
high
High — most public land permits dispersed
Nearby National Park Service units
Joshua Tree · Mojave National Preserve
Scenic drives & state byways
Rim of the World CA-18 · Mojave Road 4WD
Ordinance note for RV travelers
County Code 33.0314 prohibits overnight RV camping on unincorporated county roads except in posted dispersed zones; Mojave Preserve permits 14-day dispersed at signed pullouts.
Sourced & cited
Every fact traces to an official source
Population and land area from the US Census; ordinances and park adjacency from county.gov, the National Park Service, and the US Forest Service.
More for San Bernardino County travelers
Go deeper around San Bernardino County
8 cross-linked peers across PickRV's places catalog — siblings, parks, public land, cities, and the parent state hub.
In the same state
Other California counties in our catalog
National Park Service
NPS units near San Bernardino County
Parent state hub
California on PickRV
Sourced from the PickRV places catalog · live availability disclosed on every landing.
Nearby & related
Keep planning California
Sourced costs, campground directories, and the places worth a detour — the next layer of California trip planning.
- California RV rental costFuel · camping · tax, sourced
- California RV-friendly campgroundsHookups, rig limits, booking tips
- RV rental companies in CaliforniaLocal hosts & outfitters, verified
- Campervan & van rentals in CaliforniaVan-life routes, rules & rigs
- RV rentals in CaliforniaPickRV Wiki · 6 min read
- California Pacific Coast Highway 1 RVPickRV Wiki · 12 min read
- Ghost townsBoom-and-bust detours
- Caves & cavernsShow-cave trip guides
California rules · last verified 2026-05-10
- Rental tax
- 9.75%
- Min driver age
- 21+ std · 25+ Class A
- Gravel roads
- Permit required
- Generator quiet
- 22:00-06:00
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