Phoenix to San Diego RV Trip — 7-Day Desert-to-Coast Route

In a single week you go from saguaro forest to Joshua trees to a super-bloom desert to the Pacific surf — the American Southwest’s whole range, coast side up. The Phoenix-to-San-Diego run is the best desert-to-ocean RV trip in the country: Sonoran Desert, Joshua Tree, the badlands of Anza-Borrego, and finally La Jolla’s cliffs. It’s also a natural one-way. Here’s the 7-day route from Phoenix, with the desert-camping realities that trip up first-timers.

What does the route look like at a glance?

Seven days, about 450 miles, desert to coast, best October through April.

• Origin: Phoenix, AZ — Destination: San Diego, CA
• Distance: ~450 miles (a one-way trip)
• Recommended class: Class C 25-28 ft, or a Class B
• All-in budget: $2,900-$3,900 for two (including one-way fee)
• Best months: October–April (the deserts are brutal in summer)

The desert-camping reality

Joshua Tree is entirely dry camping, and its good campgrounds book six months out. Plan for it and the trip runs smooth.

• No hookups anywhere in Joshua Tree — arrive with a full fresh-water tank; Cottonwood and Black Rock have water and a dump station, but you run off tank and battery between fills.
• Reservations required fall-spring for five campgrounds (Black Rock, Indian Cove, Jumbo Rocks, Ryan, Cottonwood), six months ahead at 7 a.m. Pacific on Recreation.gov.
• Hookups when you need them: Anza-Borrego’s Borrego Palm Canyon has some; the San Diego coastal parks have full hookups (at premium rates).

Day-by-day route

Day 1: Phoenix → Quartzsite

Pick up in Phoenix and run west on I-10 to Quartzsite, the snowbird capital that swells from a few thousand people to a million each winter for its gem and mineral shows (January-February). Camp on the BLM long-term visitor land. Camp: La Posa LTVA (BLM) or a Quartzsite RV park.

Day 2: Quartzsite → Joshua Tree

Cross into California to Joshua Tree, entering at Cottonwood in the south — the first campground in, with water and a dump station. Catch the Cholla Cactus Garden in golden light. Camp: Cottonwood (~$25, dry).

Day 3: Joshua Tree full day

The greatest hits: Hidden Valley, Skull Rock, and Keys View over the Coachella Valley, then a dark-sky night — this is a certified Dark Sky Park and the stars are extraordinary. Camp: Cottonwood.

Day 4: Joshua Tree → Anza-Borrego

Drop southwest to Borrego Springs, ringed by California’s largest state park. Set up at Borrego Palm Canyon and go find the Galleta Meadows metal sculptures scattered across the desert floor. Camp: Borrego Palm Canyon (~$25-$45).

Day 5: Anza-Borrego full day

Hike the Borrego Palm Canyon trail to its palm oasis, watch sunset paint the badlands from Font’s Point, and — if you’ve caught a wet-winter spring — walk the super bloom. Camp: Borrego Palm Canyon.

Day 6: Anza-Borrego → San Diego

Climb out of the desert and down to the coast — about two hours to San Diego. Set up on Mission Bay and catch the sunset at La Jolla or Mission Beach. Camp: a Mission Bay resort (~$75-$145, full hookup).

Day 7: San Diego → return

Balboa Park and Old Town in the morning, then dump tanks, refuel, and return the rig (confirm the one-way fee ahead).

What does it cost all-in?

About $2,900-$3,900 for two — the one-way fee and the San Diego coast are the swing costs. Our July 2026 pull of 3,398 live listings put the national median at $150/night; a Phoenix Class C runs near it, but California fuel and Mission Bay campsites run well above. Treat these as a research-date snapshot.

Line item	Amount
Class C rental: $185/night × 7	$1,295
One-way drop fee (PHX → SAN)	$400–$800
Booking fees + insurance + cleaning	$400–$550
Fuel (450 mi @ 8 mpg @ $4.50/gal)	$253
Campgrounds (NPS/state dry $25, San Diego $75–$145)	$200–$350
Food, propane, activities (2 people)	$400–$700
All-in, 7 days	$2,948–$3,948

Our RV rental cost guide covers the method; if you’re basing out of Phoenix, see the RV trips from Phoenix guide.

Which RV class fits the route?

A Class C, 25-28 ft, or a Class B — the desert campgrounds and San Diego both favor smaller.

Class	Phoenix-to-SD fit
Class B under 22 ft	Excellent — fits the tight desert sites and parks easily in San Diego
Class C 25-28 ft	The sweet spot — Cottonwood, Black Rock, Borrego all work
Class C 30+ ft	Tight at Joshua Tree; watch site lengths
Class A any	Skip — squeezed out of the desert-park campgrounds

What goes wrong out here — and how do you handle it?

The route’s issues are heat, water, and the one-way logistics.

• Summer heat: don’t attempt May-September; 110°F+ in both deserts.
• Running dry: Joshua Tree has no hookups — fill your tank before you enter and manage power.
• No campground: the reservable Joshua Tree sites sell out — book six months out, or use a BLM area outside the park.
• San Diego sticker shock: coastal sites run $75-$145; book early and consider an inland park.
• One-way terms: confirm the drop fee and that your owner allows a one-way before booking.

Bottom line

The 7-day Phoenix-to-San-Diego route is the definitive desert-to-coast RV trip — saguaro, Joshua trees, badlands, and the Pacific in one week. Book the dry Joshua Tree sites six months out, carry water, rent one-way, and go in the cool season. See our Phoenix and San Diego city guides, the Joshua Tree NP guide, and the Arizona state guide.