Are these times decent/could I run in college?

Those times are very good and you should be able to improve on them in your senior year. If your times remain the same id say D2 but really you should just find colleges that you are interested in and contact the coach for them they will tell you what kind of times they are looking for. Do cross country in the fall it will definitely help with your times in track even if the races are longer than you're used to. Stick with it train hard and I'm sure you will do great.