Project Spotlight: Custom Modular Buildings at Dos Rios State Park
Two custom modular buildings, designed and factory built by API Trailers, now stand at Dos Rios State Park near Modesto. Here is what we built and what makes the park worth a visit.
API Trailers designed, factory built, delivered, and set two custom modular buildings at Dos Rios State Park in Modesto: a 10×18 Entrance Center for check-in and a 10×22 Welcome Center, both with custom exterior and interior finishes. The park sits where the San Joaquin and Tuolumne rivers meet and opened to the public in June 2024. Call 805-328-6031 to talk about a custom building for your site.
Every park visit starts with a building: a place to check in, pick up a map, and ask a question. At Dos Rios State Park, two of those buildings came out of API’s factory. The park was built on the property long known as Dos Rios Ranch, and California State Parks describes it as California’s newest state park.
This spotlight covers what API built, the finishes you can see in the photos, and a few highlights of the park itself. To see more of our work, browse API’s modular buildings.
A custom building on its wood deck at Dos Rios State Park
Another exterior view, with glass double doors and windows
The Project at a Glance
What API Trailers Built at Dos Rios State Park
API built two custom buildings for Dos Rios State Park: a 10×18 Entrance Center for check-in and a 10×22 Welcome Center. The Entrance Center is the smaller of the two at 180 square feet, and the Welcome Center is 220 square feet.
Both buildings were designed and factory built by API, then delivered and set at the park. Both carry custom exterior and interior finishes.
Finishes You Can See in the Photos
- Horizontal plank-style siding with black trim and black-framed windows
- Black-framed glass double doors and a large opening on the front wall
- A slatted ceiling with track and linear lighting
- Plank-look flooring
- A wall-mounted heating and cooling unit
- Finished details such as an exit sign and a fire extinguisher cabinet
Side view: black-framed window, electrical box, and outdoor heating and cooling unit, with the water beyond the deck
Interior: slatted ceiling, track lighting, glass double doors, and plank-look flooring
Ceiling detail: slatted ceiling with linear and track lighting
Have a park, campus, or public site that needs a custom building?
Call API Trailers with the use, size, site, and timeline. We will talk through what a custom building could look like.
Why a Factory-Built Building Works for a Park Site
A factory-built building is constructed indoors at API Trailers’ factory and delivered complete, which keeps the work on the park site to delivery and setting. That is how both Dos Rios buildings were done.
Site Work and Building Happen Together
While a building is built in API’s factory, site work can move ahead at the same time.
Custom, Not a Stock Plan
API customizes floor plans and finishes, which is how the Dos Rios buildings got their custom exteriors and interiors.
One Team From Design to Set
API designed, built, delivered, and set both buildings, so one company answers for the result.
Delivery Across California
Dos Rios is well north of API’s Santa Maria home base. API delivers anywhere in California with its own trucks, and delivery cost depends on distance.
Dos Rios State Park: Highlights
Dos Rios State Park is a park of about 1,600 acres, roughly 8 miles west of Modesto in Stanislaus County, where the San Joaquin and Tuolumne rivers meet. It opened to the public on June 12, 2024, according to California State Parks.
A Restored Floodplain
The park comes from a 10-year restoration funded from 11 public and private sources. State Parks calls it the largest public-private floodplain restoration project in California.
A New State Park
At its opening, State Parks called Dos Rios the state’s newest state park and the first new state park in 10 years.
Self-Guided Trails
The Pond Loop Trail is a 1.85-mile loop with a quarter-mile accessible section, and the Confluence Trail leads out to where the two rivers meet.
Wildlife
Dos Rios is a destination for birds migrating along the Pacific Flyway. A “bunny mound” shelters the endangered Riparian brush rabbit during flooding.
Picnicking
Base Camp, the day-use area, has newly built picnic tables and ramadas.
Dogs Welcome on Leash
Leashed dogs, on a leash no longer than 6 feet, are welcome at Base Camp and on the two trails.
More Custom Modular Buildings for Parks and Public Sites
Dos Rios is not API’s first State Parks project. API also built the California State Parks Nature Education Facility in Carpinteria, a two-piece permanent modular building with a classroom, office space, break room, and locker room, finished with custom-design cement siding. See the Carpinteria project page.
Other API buildings suit parks and public sites too. Guard houses work as entry booths, and custom cabin trailers are used at campgrounds and RV resorts.
Completed California Projects
- UC Merced, University of California
- Santa Rosa Fire Station
- West Basin Municipal Water District, El Segundo
- YMCA, Santa Maria
- Regional Wastewater Training Facility, Santa Clara
- Woods Humane Society, Atascadero
- Crisis Stabilization Unit, San Luis Obispo
- California State Parks, Carpinteria
- Epoch Winery, Templeton
- UCSB AS Bike Shop, Santa Barbara
- Port of Long Beach
- Cal Poly AG Department Housing, San Luis Obispo
- New Cuyama Library
- Payless Car Rental, South San Francisco
- Santa Barbara County Fire Station, Sisquoc
- USFS Rock Creek Barracks, Mammoth Lakes
- Lompoc Foursquare Church
- Paso Robles Horse Park
Frequently Asked Questions
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API Trailers builds custom buildings in its factory and delivers them across California. Tell us the use, size, site, and timeline.