Simplify the following text for a Grade 8 native English-speaking person.
Original: The Western Rift , also called the Albertine Rift , is edged by some of the highest mountains in Africa , including the Virunga Mountains , Mitumba Mountains , and Ruwenzori Range .
Simplified: The Western Rift , also called the Albertine Rift , is edged by some of the highest mountains in Africa .