Hey mate,
I was a pro triathlete with an Olympic Residence spot at the OTC in Colorado Springs and know a few D1 XC/track runners applying this year, so I know where you're coming from. The issue on my application was not playing up triathlons to too great of an extent (BALANCE, BALANCE, BALANCE). Are you researching? Are you volunteering (medical setting)? I was very weak in the volunteering area, so it could have hurt me. You still have 6 months, so I suggest you start volunteering your ass off. And I can't stress the importance of showing your life isn't just sports. Once you show that, you can play up your sports to the maximum. For example, my PS was about 33% athletics, 33% academic related, and 33% volunteering related. I didn't drop any big race names, but instead, I focused on what training at these levels had taught me. This is the most important part. It doesn't matter if you're a National Champion unless you've learned things about yourself. In the EC area, then start popping in what you've done in your sport (i.e. I talked about All-Americans, Worlds, international racing, training at the OTC, racing Ironmans- popping the impressive facts showing that you aren't a casual in your sport, instead, you love it and can spend a significant part of your youth doing so). Do. not. make. excuses.
In terms of chances, I've been accepted at my top choice (state school, PC rank in the top 30) with 2 interviews thus far at top 15 schools. My academic stats are a little bit higher than yours, but I doubt it's an issue. My interviewers loved talking about sports, and we had a good amount of fun. Did sports give me an advantage? Yes and no. On one side, I was different. On the other side, I hadn't spent a summer volunteering in another country or possessed several papers that I had authored. I was run-of-the-mill research/volunteering.
And more importantly, submit as early as you can. I screwed myself out of this, so the majority of my secondaries were submitted in November (destroying my chances at other top schools).