It's amazing how people think you shouldn't work to become good at something. If you want to be great at just about anything, it takes time and dedication. You want to be a great piano player or guitarist? Hours a day of practice. Great student? Hours a day of studying. Great at sports? Hours a day (swimming, football, soccer, gymnastics). But somehow people think if you want to be a great runner you should only run 30 minutes a day until you get to college.
When my daughter was doing gymnastics, at one of the best gyms in the city, ran by a multi-Olympic gold medal winning gymnast, she was starting to talk about doing gymnastics at a high enough level to get a scholarship to a D1 school. She had the talent. I told her she'd have to spend hours a day to get to that level (she was already training 2.5 hours a day at that point and the higher level practices were at least 4 hours a day, with the best gymnasts also booking private lessons outside of that). I told her if she wanted to go for an athletic scholarship without having to sacrifice academics, that her best bet would be running because it is the least time intensive sport. Nobody averages 2 hours a day (at her easy pace that would be about 100 miles a week). I told her that if she could handle 90 minutes of training a day plus 30 minutes of overhead (stretching, etc), that she'd be training twice as much as just about anyone else in high school.
This summer she might be putting in 2 hours a day because she's also lifting weights sometimes. It's less exercise than she was doing as a middle school student and she still finds the time to be involved in tons of school activities, achieve a super high GPA, have boyfriends, spend lots of time with friends, watch TV, and still spend way too much time on the phone. And she's also pretty solid on the guitar. Doesn't seem to be overstressed or rushing around, she's about as chill as a kid could be.
High school running is finally starting to resemble a serious sport, where people actually train properly, instead of a dumping ground of failed athletes who want to letter in something without doing any work.