Potomac River Spawn

Hey everyone,

I will be headed to the Potomac River at the beginning of June.  I plan on launching in Mattawoman creek and fishing there as well as the surrounding creeks such as Quantico, Aquia, and Potomac.  I just checked water temps and was surprised to see that they are only around 60 degrees.  That being said I was curious if anyone could offer any insight on what stage of the spawn I can expect to run into when I head there.  My guess is the tail end of the spawn and definitely post spawn, any thoughts? 

Thanks!!