RE: Tempo blocks!

Sounds like interval training is a great way to go. Less wear and tear while gaining stamina. Hopefully it will translate to a serious time reduction on your all time best on the marathon! If thing were feeling heavy and the HR up it might be wise to just do a recovery run tomorrow, but great job today. You really are taking the training seriously!

It does look like the weather has been great for running, and the scenery is nothing short of amazing. That's a great place to train!