Exhausting run..

So, for some reason I thought it would be cool to do crossfit's FRAN before runners group tonight...bad idea number 1. Bad idea number two was choosing to run a 10k with a vet marathoner tonight. He blasted me with his pace and I felt like a loser from "The Biggest Loser" during most of the run. It's always nice to get a reality check like that from time to time. It helps keep your definition of fitness in check...but boy was it painful. I always like to try and learn something from vet runners and tonight it was finding out the answer to my continuing problem of what to do for maintenance runs. Sine I finished my last two half marathons I have not been sure about the mileage I should keep up between race training plans. Tonight I was told that it's always good to keep a strong 10k under your belt because it's so easy to build up to the half distance from there. So, from now on..I'll make sure to hit the 10k on at least 1/3 of my run days each week.