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Fern Truck, Brown Mountain and El Prieto Trail Loop route map
Difficulty: DifficultLoop

Fern Truck, Brown Mountain and El Prieto Trail Loop

Altadena, California

7.6 mi

Distance

1,388 ft

Elev. Gain

3h 14m

Est. Time

Loop

Route Type

Difficult

Difficulty

About This Trail

Fern Truck, Brown Mountain and El Prieto Trail Loop is a loop trail in Los Angeles County, California. It is 7.6 miles long and gains 1,388 feet. It is in or next to Altadena, California.

From the trail data on this page.

Trail Conditions

Trail Conditions

Unknown

We have no current condition data for this trail. Check with the operator before you go, and submit a report below if you've been recently.

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Elevation Profile

Min:349 ft
Max:740 ft
Gain:940 ft
Loss:940 ft
Elevation profileA line rising and falling between 349 ft and 740 ft across 7.6 mi along the route, drawn from start to end.349 ft479 ft610 ft740 ft0.0 mi1.9 mi3.8 mi5.7 mi7.6 mi

Elevation at the labelled points along this route
PointDistance from startElevation
Start0.0 mi376 ft
High point3.7 mi740 ft
End7.6 mi376 ft

Trail Details

Route Type
Loop

Official sources & verification

Verify before you go

Where it is

Nearest town:
Altadena, CA · in or next to town
County:
Los Angeles County, CA

Nearest town and county from U.S. Census Bureau place records and county boundaries.

We display cached information from agency feeds. Hours, fees, permits, closures, fire restrictions, and conditions change without notice. Outdoors is not the permitting authority. Confirm current conditions for this trail using the links above before you go — you are responsible for compliance. Last verified by us: May 23, 2026. Our copy is more than a month old — please reconfirm with the agency before relying on it.Spot an error in our data?

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Legacy import — verify before navigating

Path geometry came from our pre-launch legacy database. Routes have not yet been re-verified against the operator and may differ from the actual trail.

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