User blog comment:Menara/The Mark of Athena Character Art Revealed!/@comment-4035682-20120818161811/@comment-3146930-20120819063646

Satyrs age at half the age of humans, so while he is said to be about 100 years old (I think like 104 exactly), biologically he is only in his early-50's. Also, he seems to take good care of himself by working out and stuff so he is in his early 50's and in excellent shape.