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Sydney Flat to Box Canyon route map
Difficulty: DifficultLoop
California

Sydney Flat to Box Canyon

Antioch, California

10.0 mi

Distance

2,881 ft

Elev. Gain

4h 35m

Est. Time

Loop

Route Type

Difficult

Difficulty

About This Trail

Sydney Flat to Box Canyon is a loop trail in Contra Costa County, California. It is 10 miles long and gains 2,881 feet. It is in or next to Antioch, 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.

No recent condition reports. Be the first to share what you see on the trail.

Elevation Profile

Min:110 ft
Max:350 ft
Gain:878 ft
Loss:878 ft
Elevation profileA line rising and falling between 110 ft and 350 ft across 10.0 mi along the route, drawn from start to end.110 ft190 ft270 ft350 ft0.0 mi2.5 mi5.0 mi7.5 mi10.0 mi

Elevation at the labelled points along this route
PointDistance from startElevation
Start0.0 mi144 ft
High point2.7 mi350 ft
End10.0 mi144 ft

Trail Details

Route Type
Loop

Official sources & verification

Verify before you go

Where it is

Nearest town:
Antioch, CA · in or next to town
County:
Contra Costa 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?

Reviews

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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.

Nearby Trails

More trails near Sydney Flat to Box Canyon
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River View Trail and Railroad Bed Trail Loop

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Lougher Loop Trail

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Arata Overlook Trail

0.2 mi
Trail

Lougher Loop Trail

0.2 mi
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Lougher Ridge Trail

0.9 mi
TrailDifficulty: Easy

Stay nearby

Campgrounds near this trail

More campgrounds

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