Bonelli Regional Park Hiking Guide
Bonelli Regional Park sits on the eastern edge of Los Angeles County and wraps around Puddingstone Reservoir, offering a surprisingly wild feel just minutes from the 210 freeway. The trail network weaves through open chaparral-covered hills, lakeside stretches, and shaded picnic corridors that work equally well for beginners and families looking for a mellow half-day outing. Elevation changes stay modest throughout, making this one of the most accessible multi-use parks in the San Gabriel Valley foothills.
Trail Overview and Route Options.
Bonelli Regional Park contains approximately 1,975 acres with a mix of paved paths, decomposed-granite fire roads, and packed-dirt singletrack. Most visitors piece together a loop of roughly 4 to 7 miles by combining the Ridgeline Trail, the lakeside perimeter path, and the connector spurs that drop toward Puddingstone Reservoir. The most popular full loop hugs the northern hills before descending to the water's edge and circling back through the day-use areas. Because the park is also used by equestrians and cyclists, staying trail-aware and yielding appropriately makes for a smoother experience on shared segments.
Elevation and Terrain
The terrain at Bonelli is characterized by gently rolling chaparral hills rather than dramatic vertical relief. Most of the elevation gain — approximately 250 to 300 feet total on a full loop — comes in short, punchy climbs along the ridge segments before the trail flattens out near the reservoir. The surface alternates between packed dirt, fine gravel, and occasional paved connector paths. Seasonal rains between December and March can introduce muddy patches on the north-facing slopes, so trail shoes with moderate grip are preferred over road runners during winter months.
Wildlife and Scenery
Puddingstone Reservoir draws a consistent variety of migratory and resident waterbirds, including great blue herons, egrets, and various duck species that concentrate near the coves from late fall through early spring. The chaparral on the upper ridgeline supports coyotes, mule deer, and California ground squirrels that are frequently spotted in early morning hours. On clear winter and spring days, views extend west toward the San Gabriel Mountains and south toward the Chino Hills, giving the park a sense of openness that surprises first-time visitors unfamiliar with this corner of LA County.
Best Seasons and Weather
Fall, winter, and spring offer the most comfortable hiking conditions at Bonelli. Temperatures from October through April typically stay in the 55–75°F range during daylight hours, and the post-rain chaparral turns vivid green from January onward. Summer hiking is possible but the exposed ridgeline sections become uncomfortably hot by mid-morning, routinely reaching the low 90s or higher. If you visit in summer, start before 8 a.m., carry at least two liters of water per person, and stick to the shaded lakeside sections. The park can also get crowded on weekend afternoons year-round due to its popularity with local families.
Parking, Access, and Fees
The main entrance is located off Via Verde in San Dimas, with additional access points along Puddingstone Drive and White Avenue near the Pomona border. Los Angeles County charges a per-vehicle day-use parking fee, which is collected at staffed kiosks on weekends and holidays; weekday entry is sometimes unattended but fees still apply via self-pay. The park opens at 7 a.m. daily and closes at dusk. Restroom facilities and water fountains are available at several trailhead staging areas, including near the boat launch and the main picnic pavilion, making this one of the better-equipped regional parks for day hikers in the Inland Empire.
Dog and Family Friendliness
Bonelli Regional Park is one of the more dog-welcoming parks in LA County — leashed dogs are permitted on most trails and in the majority of day-use areas. Water stations designed for dogs are present near the main trailhead, and the relatively flat terrain keeps the outing manageable for both small dogs and older pets. Families with young children will find the paved loop near the reservoir especially approachable for strollers and beginner hikers. The park also connects to Puddingstone Lake's fishing and boating amenities, making it easy to extend the trip into a full-day outdoor excursion without leaving the property.
Hiking tips for Bonelli Regional Park
- Start at the Via Verde entrance to access the Ridgeline Trail early, when temperatures are cooler and wildlife activity is highest along the chaparral edge.
- Carry at least 1.5 liters of water per person regardless of season — shade is limited on the upper ridge sections and refill stations are not available mid-trail.
- Wear trail shoes or light hikers with traction; winter rains leave north-facing slopes muddy, and the decomposed-granite sections become loose after dry spells.
- Check the LA County Parks website for current parking fees before you visit — rates and payment methods update periodically, and cash-only kiosks can catch visitors off guard.
- If you bring a dog, keep them on a 6-foot leash at all times; equestrian users share several trail segments and loose dogs can spook horses without warning.
Nearby trails to explore
- Chino Hills State Park Trail
- Marshall Canyon Regional Park Trail.
- San Jose Hills Trail
Hike this trail with TrailMates
TrailMates makes it easy to find hiking partners who match your pace and plan group outings to Bonelli Regional Park — use the mate finder to connect with local hikers, coordinate meetups at the Via Verde trailhead, and explore Puddingstone Reservoir together with the safety of a verified group.