1. MN River
2. Fewer Fish in P2 vs. P4
3. More is understood/known about P4 than P2
I think Joe nailed it — the MN River makes the biggest difference. In Pool 4 a large number of fish concentrate in areas we can fish. In Pool 2, it’s understood a lot of fish head up the MN River instead of to the dam. When the water comes up I’d bet the fish really get a move on up into the MN. Pool 3 is somewhat similar in structure … do people do well consistently below the dam in Hastings? In Pool 4 a ton of fish stage and even spawn in areas where we can catch them.
There are definitely far fewer fish in Pool 2 than Pool 4. The fish that do stay in the Missippi are catchable, but there just aren’t enough fish to make the fishing easy very often. In Pool 4, if all the right ingredients exist on a spot, chances are good that there will be fish there. In Pool 2, the spot might have a bunch of fish on it. Or there might be 2 fish on it. Or there might be none simply because there aren’t enough fish to cover every good spot. It’s an odds thing, I suppose.
Finally, I think there are plenty of unknowns in Pool 2. If fish do concentrate in MN River we wouldn’t know it because we can’t fish there. Everyone knows there are fish at the confluence at some times during the spring, but it’s not all that predictable … they’ll be there one day, and gone the next. Most guys fish between the 494 launch and the confluence … mostly the northern portion of that. People who explore other areas might be rewarded, but my second point about the numbers of fish mean that they aren’t rewarded all that often. I bet most P2 regulars believe that there are fish in Pool 2 that aren’t being targeted right now, but if anyone has found a new, consistent pre-spawn location it’s a well kept secret.
Mike W and I were fishing below the dam briefly the other day. He says to me, “Can you imagine how many fish would be on these rocks if this were Red Wing?”
Anyway, that’s what I think. It’s a great question, Micah.