Four Corners – View of Yorba Linda loop from Chino Hills High School

If you're looking for a serious challenge on two wheels, the Four Corners – View of Yorba Linda loop from Chino Hills High School gravel biking route delivers. This is a difficult 28.7-mile (46.2 km) ride with a substantial 3202 feet (976 metres) of climbing, typically taking around 4 hours and 25 minutes. It's an advanced gravel biking route in the Four Corners area, best suited for experienced riders with very good fitness and advanced riding skills.

What to expect on Four Corners – View of Yorba Linda loop from Chino Hills High School

This route takes you through the diverse terrain of Chino Hills State Park, known for its rolling, grassy hills and panoramic views. You'll encounter a mix of wide dirt roads and more technical singletrack, with sections featuring loose gravel, ruts, roots, and tight turns. Expect prolonged and steep climbs, particularly on parts like Bane Canyon Road, which can be brutal on the ascent. The reward for your effort includes expansive vistas from the View of Yorba Linda overlook, offering sweeping views of the city and surrounding areas. The Telegraph Canyon Trail provides a scenic contrast, winding through shaded riparian habitats with sycamore and willow trees.

Planning your visit

Starting from Chino Hills High School, this loop integrates seamlessly into the broader Chino Hills State Park trail system. Be aware that the trails are shared by hikers, bikers, and equestrians, so always be mindful of other users. The park is sensitive to weather conditions and may close for 48 hours after a quarter-inch of rain or during periods of extreme fire danger (Red Flag Warnings). Spring is an excellent time to visit, as the hills come alive with vibrant yellow wildflowers and lush green landscapes.

Trail details

• Distance: 28.7 miles (46.2 km)
• Elevation gain: 3202 feet (976 metres)
• Difficulty: difficult
• Estimated time: 4 hours and 25 minutes