I just looked at your plan and it looks as if you have two endurance runs per week with the third being a different workout. Depending on the plan, this may be fine.
Let me know what plan it is and I can look into it more.
I can train for half marathons on pavement and on trails, but as soon as I change it up to gravel or loose dirt my knee swells and the pain it causes is unreal. Any ideas why this happens?