KUALA LUMPUR, March 13 -- At 66, when many are settling into a quiet retirement, Lim Shyang Guey is lacing up for the run of his life.

A retired telecommunications professional and a runner since his twenties, Lim, fondly known as SG, has an audacious goal: To run 2,200km around Peninsular Malaysia.

It is his most ambitious undertaking yet, driven by a love that endures and a powerful new purpose.

Lim's dream is to run on all seven continents. Having already raced on four, he recently completed his second full marathon in Sydney. But his next challenge brings him home.

On March 28, he is scheduled to begin his journey from the NCSM-MPPP Home of Hope in Penang. He will travel through all 11 states in Peninsular Malaysia and the federal...