OK, I need some input here. I understand that the shovel heads go into a feeding frenzy some time in the spring before they spawn. I fish a lot of lakes and ponds and I have never been able to determine the timing of this activity. I've been doing a lot of work in Hamilton and Middletown of late and have been checking out the GMR. I've only fished this river a few times. I assume that water temp and time of year contribute to this activity. Do any of you have a method to determine this pre-spawn activity in the GMR or like a generic date guide line. I've heard a lot of guys say that this is the time to go after trophy shovels, and I don't want to miss it. Thanks for any help. I would also like to suggest keeping this thread active and trying to monitor the spawn this year. Cool deal, and good fishing.