Thanks for the replies guys! Yeah I plan to keep going as long as I can, glad to know that some people do it into their '70's and beyond. Ideally I'd like to dayhike Whitney 40 years in a row (I've done 21 now so 40 would put me around 79 years old), but I'll take what I can get. But the streak does help keep me motivated to do it again next year and well beyond.
