The advantage of Spring over Penns/Little J IMO is its reliability and consistency. All else being equal, Spring will be unfishable less often than those two…It rebounds quicker after big rain events and is more resistant to extended periods of low rainfall. Its fish are also more reliable in their behavior, and the bugs (for reasons unknown to me) seem to be more consistent and easier to predict…It has less diversity than the other two, so that’s likely part of it. Also, in terms of fish per surface area of stream, Spring has far more fish than the Little J or Penns. (I agree Little J and Penns fish are larger on average though.)
All of that being said, I’ve had bust days on Spring before too. Saturday of the Jam last year the sulphurs never showed where I was…upper Canyon stretch. Sat on a log til dark, and walked out. I saw one fish, literally, rise all evening. That can happen anywhere, though a bust day on Spring (versus what you’d expect for that day) doesn’t happen all that often. It happens more often on the Little J, and to me, it seems to happen more often than not on Penns.
Each of them has a different feel and place for me, and most years I’ll fish all of them a few times. Penns is my favorite though…can’t beat that setting and a good day on Penns beats a good day on the other two in terms of the overall experience. Good days on Penns are just harder to come by. Sometimes it’s about the setting, sometimes it’s about the challenge…Sometimes, you just want to catch some fish. I’m glad they’re all different, and all a 3 hour or less drive away.