RV travel guide
Costilla County
County seat San Luis, 1,227 sq mi across Colorado. 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 Costilla County
San Luis is the oldest continuously occupied town in Colorado — founded April 5, 1851 by Hispano settlers under a Mexican land grant predating Colorado statehood by 25 years, and the parish acequia irrigation system still routes water by 173-year-old water rights. Costilla County sits in the southern San Luis Valley at 7,500 ft basin elevation, flanked by the Sangre de Cristo Range east and the San Juan/Conejos peaks west. The Vermejo Park Ranch private inholding (now Ted Turner's bison ranch) crosses into the county from the south.
Great Sand Dunes National Park's main entrance is in Saguache County to the north but the southern approach via CO-150 from San Luis crosses Costilla County's eastern Sangre slope, with no RV-friendly campgrounds along the route until reaching Pinyon Flats inside the park.
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
medium
Medium — mixed BLM / state-trust limits
Nearby National Park Service units
Great Sand Dunes (northern approach via CO-150)
Scenic drives & state byways
Los Caminos Antiguos Scenic Byway · CO-159 to Taos
Ordinance note for RV travelers
Rio Grande NF Conejos Peak RD permits 14-day dispersed; Great Sand Dunes Preserve permits backcountry camping by permit only.
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 Costilla County travelers
Go deeper around Costilla County
7 cross-linked peers across PickRV's places catalog — siblings, parks, public land, cities, and the parent state hub.
In the same state
Other Colorado counties in our catalog
Parent state hub
Colorado on PickRV
Sourced from the PickRV places catalog · live availability disclosed on every landing.
Nearby & related
Keep planning Colorado
Sourced costs, campground directories, and the places worth a detour — the next layer of Colorado trip planning.
- Colorado RV rental costFuel · camping · tax, sourced
- Colorado RV-friendly campgroundsHookups, rig limits, booking tips
- RV rental companies in ColoradoLocal hosts & outfitters, verified
- Campervan & van rentals in ColoradoVan-life routes, rules & rigs
- RV rentals in ColoradoPickRV Wiki · 6 min read
- Wild & scenic riversFree-flowing river trips
- BattlefieldsHallowed-ground history stops
- National memorialsMonumental road stops
Colorado rules · last verified 2026-05-10
- Rental tax
- 7.60%
- Min driver age
- 21+ std · 25+ Class A
- Gravel roads
- Varies by rig — verify with vendor
- Generator quiet
- 22:00-07:00
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