Sierra Peak and Coal Canyon Loop

This challenging loop typically takes around 6.5 hours to complete, though your actual time may vary depending on your fitness level and how long you spend enjoying the views. It covers approximately 20.3 kilometers (12.6 miles).

No, this trail is rated as difficult and is not recommended for beginners. It involves significant elevation gain (over 820 meters or 2,700 feet) and a long distance, requiring very good fitness.

The terrain is quite varied. You'll primarily be on fire roads, which can range from well-maintained to rutted and soft or sandy, especially in the middle sections with steep ramps. The trail is fully exposed, offering little shade, and requires sure-footedness in some parts.

Hikers are rewarded with exceptional panoramic views from the Sierra Peak Summit, including north Orange County, Corona/Riverside, and distant mountains like San Gorgonio and Mount Baldy. You'll also pass the View of Irvine and Orange County from Picnic Rock, a grove of threatened Tecate cypress trees, Mini Moab (a sedimentary outcrop), and the 'red scar' of an abandoned mine.

No, there are no natural water sources or facilities to refill water along the entire route. It is crucial to carry sufficient water for the duration of your hike, especially given the trail's full exposure to the sun.

Yes, dogs are generally allowed on the trails within Chino Hills State Park, including this loop. However, they must be kept on a leash at all times. Please remember to bring enough water for your dog as well, as there are no water sources on the trail.

Parking near the trailhead, particularly at the Santa Ana River Trail (SART) trailhead, has been reported to have issues with car break-ins. You might see visible broken glass in the parking lot. Some hikers opt to park further away and bike to the trailhead to avoid this risk.

Yes, as this trail passes through Chino Hills State Park, there is typically an entrance fee required. You can usually pay at the park entrance or a self-pay station. Check the official California State Parks website for current fees and any specific permit requirements for certain activities.

The best time to hike is during the cooler months, from late fall through spring (October to May), to avoid extreme heat. Since the trail is fully exposed with no shade, summer hikes can be very challenging and potentially dangerous due to high temperatures. Early mornings are always recommended.

Yes, the route utilizes several named trails to form the loop. You'll hike sections of the Coal Canyon Trail, Leonard Road, and the Pipeline Trail, among others. The Santa Ana River Bicycle path also makes up a portion of the route.

The trail passes through the Coal Canyon Ecological Reserve and a wildlife corridor under the 91 Freeway, increasing your chances of spotting local fauna. Keep an eye out for various birds, rabbits, and possibly larger mammals like deer or coyotes, especially during quieter times of day.