I recommend reading Mark B.'s comments on the Manasquan in a previous thread:
http://www.njfishing.com/forums/showthread.php?p=212478
I'm pretty sure that the Manasquan gets too low and hot during the summer, so there are no holdover trout from one year to the next. Even though it's a poor habitat for trout, apparent some sea run brown trout swim up it to spawn.
http://www.njfishandwildlife.com/crunbrn.htm
http://www.state.nj.us/dep/fgw/news/2002/crunman02.htm
