Where the Heights Begin
North of Upland, where city streets begin to bend toward the foothills and the San Gabriel Mountains rise sharply beyond the rooftops, San Antonio Heights has long felt like a place apart. It is close to the shops, schools, and civic life of Upland, yet its tree-shaded roads, spacious lots, and mountain views give it a quieter, almost rural character.
Today, San Antonio Heights is an unincorporated residential community in San Bernardino County, directly beside the Angeles National Forest. Residents often describe it as private, neighborly, and peaceful—a neighborhood where large trees, unusual homes, narrow roads, and long-established families are as important to its identity as any official boundary.
The community’s name comes from the San Antonio landscape: San Antonio Creek, San Antonio Canyon, and the mountain now commonly called Mount Baldy, whose official name is Mount San Antonio. The name “heights” is especially fitting. From the neighborhood’s upper streets, the land rises above the citrus plain, offering broad views south across Upland and Ontario.
From Mountain Water to a Planned Community
San Antonio Heights grew out of the same late-nineteenth-century development that transformed the Ontario and Upland area. In the early 1880s, George and William Chaffey helped establish an agricultural colony using water from San Antonio Creek and the surrounding mountain canyons. Their irrigation system made it possible to cultivate orchards in what had previously been dry inland country. Euclid Avenue became the defining spine of the colony: a broad, landscaped boulevard stretching from Ontario toward the foothills.
The Ontario Land and Improvement Company recognized that the elevated mesa north of town could become more than an agricultural district. In the late 1800s, promoters envisioned San Antonio Heights as a resort community, taking advantage of its cooler air, mountain scenery, and easy access to water. Plans called for a grand five-star hotel near the center of the mesa and an electric railway running from the Southern Pacific line up Euclid Avenue toward the mountains.
The resort never materialized, but the planning left a lasting mark. In 1886, the land was divided into residential lots and laid out with a distinctive curving street pattern rather than the strict grid used in much of the valley below. That design remains one of the neighborhood’s signatures. Driving along 24th Street, Mountain Avenue, and the connecting residential roads, visitors quickly notice that San Antonio Heights feels more organic and winding than much of surrounding Upland.
The Streetcar That Connected the Heights
For a young foothill community, transportation was essential. In 1887, the Ontario and San Antonio Heights Railway began operating with mule-drawn cars. The route climbed north from Ontario along Euclid Avenue, carrying residents, visitors, and day-trippers toward the Heights. On the return trip, the cars could coast downhill, with the mules riding along. The line was electrified in 1895, making travel faster and more practical.
The railway also served recreation. A roughly thirty-acre amusement park was developed in the Heights, and the streetcar brought crowds up from Ontario and Upland to enjoy the mountain setting. San Antonio Heights was not simply a bedroom community; it was promoted as a destination for fresh air, picnics, and leisurely outings.
The most visible reminder of that era stands at San Antonio Park, near 24th Street and Mountain Avenue. The stone-and-mortar Ontario and San Antonio Heights Railroad Waiting Station was built in 1907 when the railway was extended to San Antonio Park. Its rough stone walls, arched openings, and sturdy Romanesque Revival appearance make it one of the neighborhood’s most tangible historic landmarks. Today, the waiting station remains in the park, where it serves as a small museum and reminder of the days when visitors arrived by rail.
Orchards, Homes, and Working Landscapes
Although the neighborhood began as a proposed resort subdivision, agriculture remained part of its story for decades. Citrus groves spread across the lower elevations and eventually reached portions of San Antonio Heights. The region’s economy was tied to lemons, oranges, packing houses, rail transportation, and the cooperative marketing systems that made Inland Empire citrus famous across the country.
One especially important surviving property is the San Antonio Heights Grove House at 300 East 24th Street. The site reflects the transition from rural agricultural land to residential neighborhood. Citrus cultivation continued there into the 1970s, even as postwar development and rising land values gradually replaced orchards with houses. The property helps illustrate how slowly San Antonio Heights changed compared with the denser communities below.
That gradual pace is part of the area’s charm. Many homes sit well back from the road, behind mature trees and long driveways. Some date from the early twentieth century, while others reflect the postwar decades when Upland expanded and Southern California became increasingly suburban. Rather than one uniform architectural style, the neighborhood offers a pleasant mixture of cottages, ranch houses, hillside homes, and custom residences.
A Community with Its Own Traditions
San Antonio Heights has also built a strong tradition of local pride. One of its most beloved symbols is the enormous illuminated holiday star that has shone from a hillside residence since the 1950s. The original star became a seasonal landmark visible from the valley below. It was destroyed, along with the residence, during the 2003 Grand Prix Fire, but residents organized to purchase and install a brighter replacement. The star continues to glow during the holiday season, a simple but powerful example of neighbors preserving a shared tradition.
The neighborhood’s sense of identity has endured even as government boundaries and surrounding development have changed. San Antonio Heights remains outside the incorporated City of Upland, but it is closely connected to Upland’s institutions, streets, parks, and history. The Cooper Museum and Chaffey Communities Cultural Center in Upland preserve stories from across the region, including Upland, Ontario, San Antonio Heights, Mount Baldy, and neighboring communities.
San Antonio Heights Today
Modern San Antonio Heights is neither a resort nor an orchard district, yet traces of both remain. The old street pattern survives in the winding roads. The mountain setting still shapes daily life. San Antonio Park continues to provide recreation, while 24th Street and Mountain Avenue remain familiar routes through the community. The railway is gone, but its waiting station anchors the neighborhood’s memory.
What makes San Antonio Heights special is the way its past remains visible without feeling frozen. Families have remodeled older houses, new residents have settled among longtime neighbors, and wooded lots have gradually replaced many of the old groves. Even so, the neighborhood has retained its spaciousness, its independent spirit, and its close relationship with the mountains.
For anyone strolling beneath the trees or looking north toward Mount San Antonio, the history is easy to sense. San Antonio Heights still carries the ambitions of its founders, the romance of its old railway, the work of its citrus growers, and the everyday care of generations of residents. It is a foothill neighborhood with a long memory—and that is precisely what gives it such a warm and enduring character.