Diamond of a Hike

Hike Diamond Bar Loop in Los Angeles County

The 1.5-mile Diamond Bar Loop might be located in the center of Diamond Bar, but once you get out on the trail it’s easy to forget you’re in the thick of a busy place.

The trail can be hiked in either direction, and there is no benefit to choosing one way over the other, though from the parking lot it’s easier to see the clockwise loop trail entrance (near the gazebo and signage in the far corner of the lot).

As the trail leaves the literal Diamond Bar City Center in Summitridge Park, it quickly drops down into the coast live oak woodland community of the canyon floor, with towering oak and sycamore trees. It passes through the bottom of the canyon briefly before beginning the climb back up along hillsides covered in cactus, mustard, sage, deer grass, and toyon (also known as California holly due to their similar appearance).

Overall the trail gains 337 feet in elevation but with frequent breaks to enjoy the setting sun, it doesn’t feel all that bad. Eventually the trail will hit a T-intersection with the Canyon Loop Trail, where you’ll head right, continuing your clockwise loop journey. Before long you’ll see a fork in the trail with the right fork heading towards the Diamond Bar Center. Take that fork and follow it all the way back to the parking lot! {NOTE: You will be in a different area of the parking lot when you finish, so just follow the path near the building to get back to where you started.} For the best sunset experience, head clockwise on the trail and aim to be on the second half of your hike by the official sunset time, that way you’ll be on the high ground during the peak colors of sunset. The parking lot closes 30 minutes after sunset, so mind your time!

The Diamond Bar Loop Trail is located in Summitridge Park at Diamond City Center. Map. Parking lot closes 30 minutes after sunset, so be sure to time your hike accordingly (on average, this trail takes about 1 hour). Dog-friendly.

Story and photos by Natalie Bates, @wanderwithnatalie

Trending Stories NorCal

View all Stories
  1. Serene Las Gallinas

    A serene stroll alongside marshland, passing ponds and grasses frilled in seasonal wildflowers, with Mount Tam a beacon in the background … how nice. As part of the esteemed Bay Trail, San Rafael’s Las Gallinas Valley Birding Loop and Wildlife Ponds comprises about 3.5 miles of wide-open trail.

    View
  2. Paint Brushy

    This time of year you’ll have good reason to head for the hills—the electric-green rolling hills of Brushy Peak Regional Preserve in Livermore. This 4.5-mile loop hike is like stepping into a plein air painting.

    View
  3. Sponsored

    2025 POST Wildflower Walks

    Get flower empowered! POST’s complimentary 2025 Wildflower Walks guide blooms with the best places to see a variety of florals across the Peninsula and South Bay this spring.

    View
  4. All right, Almaden!

    Take a trip through time on this 5-mile loop in Almaden Quicksilver County Park. Explore the ruins of an old cinnabar mine and enjoy the first hints of wildflower season.

    View

Trending Stories SoCal

View all Stories
  1. Sponsored

    Weekend in Reno Tahoe

    Weekend plans? Reno Tahoe! Just a few hours by car or a short flight away, Reno Tahoe springs to the moment with great ways to combine adventure and relaxation in its beautiful mountains-meets-desert setting.

    View
  2. Hiker walking along the North Bluff Trail on Santa Cruz Island, Channel Islands National Park

    Purely Wild

    Channel Islands National Park lives up to its nickname as “North America’s Galapagos.” This less-traveled national park is an undeveloped and isolated series of five dramatic and distinct islands reached by boat. Hike the largest of the islands, Santa Cruz.

    View
  3. Woman hiking the South Kaibab Trail in the Grand Canyon

    Truly Grand Day Hike

    One of the best spring day hikes in the Grand Canyon? See layer upon layer of the park’s grandeur—including the river—on this 3-mile (one-way) journey to Skeleton Point via the South Kaibab Trail.

    View
  4. A woman stands amid an array of yellow and purple flowers at Descanso Gardens in Los Angeles

    Petal Paradise

    Tulips, lilacs, and daffodils—flower power is in full bloom at Descanso Gardens in La Cañada Flintridge. Sprawling across 150 acres surrounded by mountains, the gardens are putting on their best show right now.

    View