Lumholtz speculated that they had migrated south, into Mexico's Sierra Madre, and were still living ... Read More David Roberts is is a veteran mountain climber and author of 27 books, including ...

Every year, millions of monarch butterflies migrate from eastern areas of North America to the Sierra Madre Mountains in ...

Officials urged residents in a Sierra Madre neighborhood to be cautious after a mountain lion was spotted Thursday morning. The big cat was seen in the area of North Baldwin Avenue between East ...

LOS ANGELES - The City of Sierra Madre issued evacuation orders and warnings Wednesday for several areas in the foothills of ...