Azusa Rock Trail Access

Hours of Operation

Trail Rules

No Trespassing

Permit Documents

About Vulcan Materials Company


About Vulcan Materials Company

Vulcan Materials Company, Western and Mountain West Divisions produces contruction aggregates (rock, sand, gravel), ready-mixed concrete and asphalt in California, Arizona and New Mexico and owns and operates four facilities in the San Gabriel Valley: the Azusa Rock Quarry in Azusa and the Reliance I Quarry, the Irwindale Hot Mix Asphalt Plant, the Reliance II Landfill and the Durbin Quarry, all located in Irwindale.

For information about our sustainability program, please visit our sustainability website at

Our parent company, Vulcan Materials Company, is one of the nation's largest producers of construction aggregates. For more information, please visit