This is very sad news. Did he not recently make plans to move to a new location for his retirement?
My sincerest condolences for his family in any case.
I had never met the man, but he was a courteous and knowledgeable gentleman in all correspondence.
Condolences to his family. As others have said, he seemed to be incredibly well versed in doubles and steeped in experience. I never had a conversation with him but always felt a kinship because he was in Alaska too.
I used to be a sprinter, in a much younger version of myself, a lifetime ago, and I wasn't horrible at it. Running though the end not to the end always stuck with me, as having much more application than just short races. Life is too short no matter how long you live. This life here is but temporary. Never, ever take anything for granted, not a single day or experience. It sounds like, with a hunt planned next month, Cal was still running through the end. Good on him.