A Lake Oswego man died while attempting to climb one of the tallest mountains in the Americas last weekend.

KOIN Local 6 reported that relatives and friends of 42-year-old David Reinhart of Lake Oswego said he died during a climb of Mount Aconcagua in Argentina.

Reinhart was a managing director of Portland-based Felton Properties, a commercial property company.

According to news reports, Reinhart suffered altitude sickness during the expedition. His two climbing partners both sought help, and one died in the process.