Trailblazing Adventures: The Best Hikes Near Ontario, CA for Every Explorer

For a unique hiking experience that blends native plant education with scenic walking, the Big Tree Trail at the California Botanic Garden (formerly Rancho Santa Ana Botanic Garden) in Claremont is a standout. Recommended by the New York Times and local horticultural societies, this independently operated nonprofit garden offers curated trails winding through native California plant communities. The Big Tree Trail, in particular, showcases impressive specimens and provides interpretive information about the region’s ecological diversity. The garden is open to the public, and its mission supports environmental education and sustainable landscaping for Southern California.

Apart from the popular falls trail, the broader North Etiwanda Preserve offers a range of interconnected paths through preserved foothill habitat. Praised by the San Bernardino County Sentinel and the preserve’s own interpretive programs, this area is committed to habitat restoration and environmental education. Hikers can explore gentle loops or challenging offshoots with sweeping views of the valley below. Educational signs along the routes provide insights into native wildlife and the region’s conservation efforts, making every visit both scenic and meaningful.

Chino Hills State Park stretches across thousands of acres of rolling hills and oak woodlands, offering a network of trails for every experience level. Recognized by Condé Nast Traveler as one of Southern California’s premier wildflower viewing destinations, the park is cherished for its sweeping vistas, birdwatching opportunities, and tranquil escape from urban life. Locally managed and supported by Friends of Chino Hills State Park, the area reflects a strong commitment to conservation and community education. Multiple trailheads—including the Bane Canyon entrance, easily reached from Ontario—make it a flexible option for both day hikers and seasoned trekkers.

Claremont Hills Wilderness Park is a perennial favorite among locals and visiting hikers alike, featuring a well-maintained five-mile loop that winds through chaparral-covered hills and offers panoramic views of the San Gabriel Mountains. Regularly spotlighted by the Los Angeles Times for its accessibility and natural beauty, the park’s community-driven conservation efforts are evident in its thoughtful signage, clean facilities, and active volunteer programs. Early mornings here bring a steady stream of friendly walkers, trail runners, and families, all drawn by the sense of connection to the land and to each other. The city of Claremont’s official website confirms the park’s open status and commitment to maintaining a welcoming environment for all skill levels.

Frank G. Bonelli Regional Park, located west of Ontario, is home to a sprawling trail network that circles Puddingstone Reservoir and weaves through rolling hills. The park is spotlighted by local publications like LAist and the San Gabriel Valley Tribune for its accessible trails, lakeside views, and family-friendly amenities. Independently operated by Los Angeles County, Bonelli Park also hosts community events and nature programs, making it a vibrant hub for walkers, cyclists, and birdwatchers alike. The variety of trail options ensures that everyone—from beginners to seasoned hikers—can find their perfect route.

Just a short drive from Ontario, the San Antonio Falls Trail leads hikers through alpine forests to a dramatic multi-tiered waterfall at the base of Mount Baldy. Regularly featured by Modern Hiker and the San Gabriel Mountains National Monument, this well-traveled path is accessible to most skill levels and offers a taste of the high-elevation environment without a strenuous climb. The area is managed by the U.S. Forest Service, and recent trail reports confirm the route is well-maintained and open, especially popular during spring and early summer.

Marshall Canyon Regional Park offers a more rustic hiking experience, with winding single-track trails shaded by ancient oaks and sycamores. Recommended by the Inland Valley Daily Bulletin and local hiking groups, this lesser-traveled network sits just north of Ontario and is managed by Los Angeles County Parks. The area is renowned for its peaceful ambiance, occasional deer sightings, and the diversity of its plant life. Community events and stewardship programs further root the park in the local culture, making it a cherished resource for those seeking solitude or a quiet escape from the city.

Telegraph Canyon Trail stands out as one of the signature routes within Chino Hills State Park, frequently highlighted by Modern Hiker and the Chino Hills State Park interpretive staff. The trail traverses grassy meadows and wooded corridors, offering chances to spot mule deer and native birds. Its moderate length and varied terrain make it a favorite for those seeking a half-day adventure with a real sense of immersion in the Inland Empire’s natural landscape. The park’s official website confirms the trail’s open status and ongoing maintenance.

Sycamore Canyon Wilderness Park, recommended by Riverside’s official tourism board and the Press-Enterprise, is a sprawling preserve managed by the city of Riverside but easily accessible from Ontario. The park’s extensive trail system navigates hillsides dotted with wildflowers, rocky outcrops, and ancient sycamores. Community-led restoration projects and educational signage reflect a deep local investment in the land’s health and heritage. The park remains open and welcoming, offering both challenging hikes and peaceful strolls for nature lovers.