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Henninger Flats Trail route map
Difficulty: ExpertOut and Back

Henninger Flats Trail

Pasadena, California

5.5 mi

Distance

3,661 ft

Elev. Gain

2h 32m

Est. Time

Out & Back

Route Type

Expert

Difficulty

About This Trail

Henninger Flats Trail is an out-and-back trail in Los Angeles County, California. It is 5.5 miles long and gains 3,661 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:387 ft
Max:781 ft
Gain:1,116 ft
Loss:1,116 ft
Elevation profileA line rising and falling between 387 ft and 781 ft across 5.5 mi along the route, drawn from start to end.387 ft518 ft650 ft781 ft0.0 mi1.4 mi2.7 mi4.1 mi5.5 mi

Elevation at the labelled points along this route
PointDistance from startElevation
Start0.0 mi404 ft
High point2.9 mi781 ft
End5.5 mi404 ft

Trail Details

Route Type
Out & Back

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 24, 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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