Honestly, the only guys I personally know who've done that did so by stepping away from the sport for a time.
Having said that, rando is one avenue that will challenge you, will reward you if you stay fit, but not require you to be so focused on performance. Take caution, though: there are always guys on the front pushing things to the limit. Things can get stupid with distance and sleep deprivation if you get sucked on to that group.