Kathmandu, Nov. 15 -- My time in the Himalaya began as a climber in Kashmir in 1965. But the years pass, and climbing has given way to trekking.

It started in Baltistan, when the youngest of our three children was seven, and during the last seven years my wife Connie and I have trekked every season, covering the entire span of the Himalaya from Ladakh, through Himachal Pradesh and Uttarakhand, to Nepal and Bhutan.

This year's trek covered a wonderful circuit in eastern Nepal, starting in Taplejung, crossing four major passes: the Lasiya Bhanjyang (3,420m), Selele La (4,632m), Nango La (4,700m) and Lumba Sumba (5,159m) to finish down the Arun River in Num.

Accompanying us was an old friend, Peter Dean, who had been with us in 2013 when we...