The fifth night was the coldest, and Thomas Gray worried he might freeze to death if he stopped moving. 

The 73-year-old boater from North Fork, Idaho, was huddled inside a pitch-black trailer just outside the remote Frank Church River of No Return Wilderness on May 21. He was near an empty campground and silent airstrip; the only road there was snowed in and the highway was miles away and over a mountain pass. 

Gray’s story is harrowing and improbable, not only because of his own feat of backcountry survival, but because his brother died two years earlier, almost to the day, in almost the same place, when they attempted the same float that year. 

With me today is Joshua Murdock, outdoors and natural resources reporter at the Missoulian. He extensively interviewed Thomas Gray, his wife Lori, the people who found him and the people involved in searching for his brother two years ago.