goaliedad,
I have been running cross country and track since my freshman year and have received a couple varsity letters. However, I don't have any leadership experience (I could possibly be a cross country captain this coming fall).
The schools I'm interested in are the University of Cincinnati, Xavier University, and possibly other schools such as Miami (OH) or Ohio University.
It would be good to nail down the captain situation before putting in your application (first board in October). Hopefully, you should know this sometime this summer?
I'll give you some more hints about school selection and ROTC scholarship competitiveness (this applies to both 4-year and walk-on situations). Public schools tend to have more scholarships these days - particularly for in-state students.
You should also be in the top half (top quarter is even better) of applicants to a school. I'd say that unless you pull up that ACT score quite a bit, you should broaden your school list. The great thing about Ohio is that there are a lot of schools with AROTC units. They range from the most exclusive to the ones where you have very little competition for admission.
Another advantage of being above average for the school you attend is that keeping a high GPA (a requirement for keeping your scholarship and critical for getting Active Duty upon commissioning) is probably a bit easier considering the competition. And every ROTC graduate from every school from Harvard down to the lowliest is commissioned as a 2nd lieutenant with the same pay and benefits. The Army does not care where you get your degree. They care about your grades, your physical fitness, your leadership (in and outside of your unit).
Another thing that you should keep in mind when investigating school is that many state schools have a large percentage of their cadets going National Guard. Many have SMP scholarships. One thing to remember is that if you take state money (as opposed to federal money), the Guard has you - AD is not an option. There is SMP money that is Federal. There is a member who frequents this site (name starts with OhioParent - I can't remember how it ends) whose son is SMP at Ohio U IIRC. Definitely a better resource than I am in that department. Hopefully will see this thread and chime in.
Keeping National Guard in mind, once you have a set of schools on your list, you will want to talk to the recruiting operations officer (ROO) to find out what their AD commissioning targets are per year and how most of their AD commissioning cadets join the unit. It might give you a clue as to whether they get many scholarships or whether walk-ons get scholarships.
One last thing... You might also find out (if you are still interested in continuing and are competitive) about running x-country in college. ROTC units love varsity athletes - a bonus for getting ahead of your peers competing for advanced standing - and units work with coaches to minimize conflicts. Plus it is a great way to keep in top shape.
So many things to learn about.