***PLEASE NOTE: The Antonovich trail is a popular trail that has experienced a large amount of visitation since trails reopened on May 9, 2020. If the San Dimas Avenue Trailhead parking lot is full, do not park along the street. It is advisable to park at the Lyman Staging Area (end of Scarborough Lane, -past Liverpool Court crossing, San Dimas, CA 91773) or at the Valley Center Staging Area (1100 S. Valley Center Avenue, San Dimas, CA 91773).
Please use caution along the Antonovich trail. Water will be released from the Puddingstone Dam into Walnut Creek and the Walnut Spreading Basin.***
The Antonovich Trail is a 3.8 mile trail that descends into a canyon then follows a stream to a flood control channel. With portions that are difficult and others that are flat and wide, this trail offers a variety of experiences for users to choose from.
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