Joining a Sport?

<p>I was sports for my last two years of HS and am currently a senior getting close to graduation. I've been thinking about joining a sport in school next school year, particularly Cross Country or Track and Field. I was a decent runner but not close to being the best so I just wanted to know if it's something I should even consider. If so, how do I go about joining a sport? (I'm a guy if it makes any difference) Thanks!</p>