Randy Udall, brother of Colorado Senator Mark Udall, has been found dead in a remote area of the Rocky Mountains, apparently from natural causes, according to a statement from the lawmaker. “Randy left this earth doing what he loved most: hiking in his most favorite mountain range in the world,” the statement read. “Randy’s passing is a reminder to all of us to live every day to its fullest, just as he did.” Their family had reported Randy, an experienced hiker, missing earlier in the week after he failed to return from his trip.

CNN:

"Randy Udall, 61, went on a hike in the Wind River Range in Wyoming on June 20 and was expected back six days later.

When the experienced hiker did not return, family members reported him missing. Rescue crews and helicopters scoured mountain passes to find him.

A helicopter search team discovered his body in a remote area on Wednesday afternoon, the Sublette County Sheriff's Office said."

Udall, brother of Senators Mark Udall of Colorado and Tom Udall of New Mexico, also is a son of the late Morris “Mo” Udall of Arizona, reportedly had planned on backpacking alone for nearly a week, starting on June 20. He is known to be an experienced mountaineer, and to have hiked in the Wind River Range numerous times.

Udall, a locally well-known advocate for alternative energy and the need to protect the environment from over-development, co-founded and was the original director of a valleywide energy efficiency organization, called the Community Office for Resource Efficiency or CORE.

Udall also has been an outspoken critic of the oil and gas recovery method known as hydraulic fracturing, or “fracking,” which is in widespread use around the U.S. and in Western Colorado, particularly in Garfield County,