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Orange County
Fullerton

Brea Dam and Lost Trail Loop

Easy

Brea Dam and Lost Trail Loop

01:12

4.56km

40m

Hiking

Embark on the Brea Dam and Lost Trail Loop, an easy hike covering 2.8 miles (4.6 km) with a gentle elevation gain of 147 feet (45 metres). You can expect to complete this route in about 1 hour and 12 minutes. The trail offers a varied experience, transitioning from dirt paths and gravel to a short paved section along the top of the Brea Dam. As you hike, you will cross a concrete bridge and a wooden board over Brea Creek, where you can enjoy the sound of running water. This route provides views of the surrounding hills, giving a sense of nature even close to the city.

Brea Dam Park serves as a convenient starting and ending point for your adventure on the Brea Dam and Lost Trail Loop. You will find ample parking available at the park, making it easy to begin your hike. The trail is generally accessible, which means it is a good choice for a spontaneous outdoor activity. Consider visiting during cooler parts of the day for a more comfortable experience, especially in warmer months.

This route is nestled within the Brea Dam Recreation Area, offering a surprising sense of wilderness despite its urban surroundings. The presence of Brea Creek, with its calming running water, adds to the natural appeal of the area. The trail's design provides a pleasant outdoor escape, making it a notable option for those seeking a quick and accessible nature experience in the region.

Last updated: April 23, 2026

Waypoints

A

Start point

Bus stop

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1

1.50 km

Brea Creek

Highlight • River

This is a refreshing creek that runs along the Brea Dam Trail up to the dam.

Tip by

2

2.49 km

Brea Dam

Highlight • Structure

More than anything, Brea Dam Park serves as a great spot to start and finish rides on the Fullerton paved and unpaved trails.

Tip by

B

4.56 km

End point

Bus stop

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Way Types & Surfaces

Way Types

2.63 km

1.93 km

Surfaces

2.22 km

1.42 km

517 m

250 m

112 m

< 100 m

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Elevation

Elevation
Nothing selected – click and drag below to see the stats for a specific part of the route.

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Frequently Asked Questions

Where can I park to access the Brea Dam and Lost Trail Loop?

The most convenient starting point for this loop is Brea Dam Park. You'll find parking available there, making it easy to begin and end your hike.

Is the Brea Dam and Lost Trail Loop dog-friendly?

Yes, the trail is generally dog-friendly. However, always ensure your dog is on a leash and that you clean up after them to maintain a pleasant experience for all users.

What is the best time of year to hike this trail?

Spring is an excellent time to visit. The undeveloped landscape becomes lush with vibrant yellow wildflowers and purple lupine, offering beautiful scenery. The trail is also enjoyable year-round, but spring provides a particularly colorful experience.

Are there any entrance fees or permits required for the Brea Dam Recreation Area?

No, there are typically no entrance fees or permits required to access the Brea Dam Recreation Area or to hike this trail.

What is the terrain like on the Brea Dam and Lost Trail Loop?

The trail features a diverse terrain, primarily consisting of dirt paths. You'll also encounter sections of gravel, unpaved areas, and a small paved portion along the top of the Brea Dam. Hikers will cross a concrete bridge and a short wooden board over a creek. Some segments are narrow hillside trails, and dense plant life occasionally forms natural archways you might need to duck under.

Is the Brea Dam and Lost Trail Loop suitable for beginners?

The trail offers a varied experience. The "Lost Trail" segment is considered easy and suitable for all skill levels. However, the Brea Dam Trail itself has sections described as moderate, with some hills that can provide a good workout. Overall, it's accessible for various fitness levels.

What kind of scenery and points of interest can I expect along the route?

You'll experience natural beauty with views of surrounding hills, St. Jude Hospital, and the Brea Dam. Highlights include the calming running water of Brea Creek, areas shaded by eucalyptus trees, and a picturesque cactus garden. You can also enjoy scenic vistas from Bella's Place, an equestrian spot on a hill. Despite its urban setting, it often feels like a wilderness area.

Does the Brea Dam and Lost Trail Loop connect with other trails?

Yes, the trail system is well-integrated. It connects to the Brea Dam Recreation Area, the Fullerton Municipal Golf Course, and Trail Rest Park. The route also passes through sections of the Brea Dam Trail, Lost Trail, Saint Jude's Bike Path, East Coyote Hills Trail, and Panorama Trail.

Are there any unique features or hidden gems along the trail?

Absolutely! The "Lost Trail" section is aptly named due to its history of being virtually hidden until its discovery. You'll also find distinctive tunnels that pass under Bastanchury Road, leading to either the Lost Trail or the golf course. Keep an eye out for a charming cactus garden and enjoy the tranquil murmuring of Brea Creek throughout your hike.

Is this trail family-friendly?

Yes, the Brea Dam and Lost Trail Loop is generally considered family-friendly, especially the easier sections like the "Lost Trail." The diverse terrain and interesting features make it an engaging experience for various ages, though some moderate sections might be more challenging for very young children.

What should I bring for a hike on this trail?

Given the varied terrain and potential for sun exposure, it's advisable to bring plenty of water, wear comfortable hiking shoes, and consider sun protection like a hat and sunscreen. Depending on the season, layers might be useful. While it feels like a wilderness, it's still good practice to carry a basic first-aid kit.

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