In high school, I would do 30-40 miles. Had trouble running 40+, which I would get injured afterwards.
In my first year of running in college (second year of school), during track season, the coach was pretty much like that. Monday was workout on the grass fields, Tuesday was weights, Wednesday was workout on the grass fields, Thursday weights, Friday distance run, Saturday long run or competition.
During XC, there wasn't weights and no double days. Pretty much quality focused.
On tuesdays and thursdays, the weights I did were not what I should be doing. Gained so many pounds of muscle and arms were massive. It was hard to run afterwards. Then at the end of season, which I was racing unattached, the assistant coach told me to ditch weights. Ran solid times. Loss those pounds after the season and the coach got fired.
That season, I went from 4:31 1500 - 4:19 1500. During the winter, I was running 50+ mpw. All easy running. So my friend, my advice is have a good base in the offseason. I think my success that year, which was surprising, was caused by my base. Now I am a 4:11 1500m runner and 26:45 8k runner.
Now I'm at a club team. the club is quality focused as well where they do 20+ miles. Their schedule works for me since I spend 3/4 of my week on my own where I can put in 70+ miles.