I am hoping to get some training advice from a coach or someone experienced with ultra training.

Goal: Be able to complete a 50-mile trail run December 1st, injury-free (North Face Endurance Challenge, SF)

I just finished running a half marathon and am thinking about next season training for a full marathon but there could be a few road blocks for someone like me. I need some advice based on my experience/training etc.

So every once in a while, I get this odd shoulder pain in my right shoulder when I'm running. It's not every time but when it does happen, it usually forces me to stop. I usually run between 3-4 miles whenever i do run and lately i've been practicing more forefoot landing and relaxing while I run. I have injured my shoulder in the past during weight training and every once in awhile it does get aggravated. I'm just confused as to why it comes up when i'm running and if there is any way I can prevent it?

Thanks

I recently ran san Diego rock and roll marathon on Sunday . Training was good, injury free. I followed Hal higdon intermediate advanced plan. Set out at a 6:52 pace to run a 3:00 marathon. I found a group and we were spot on every split until mile 16. Everyone's been there. The group slowly drifted away and I mumbled every curse word I knew under my breath. There was no more speed left in my legs. Im 30 y/old and this was my 11th marathon. I should know what I'm doing out the by now, guess not . PR: Boston 2011 3:09:20 .