A great 6 plus a hard 4 still equals 10. But wow, I felt great and went out a little too quick, and then the hills by the Mississippi started to hit me, particularly as I turned toward home. (I'm used to river runs being flat ... but the Mississippi here has carved out a bit of a gorge, and so the paths alongside the river go up and down.)
First run of this training season at mid-morning (rather than at dawn). Already awake, some food in me, etc. etc.. Perhaps this is why I went out too quickly - I felt good.
Also, first long run with a baseball cap on. Not crazy about it, but it is good for the sun ... ;-)