Racing Weight

You're fine. Eat healthy, run a lot, and do your strength exercises. As long as you're not gorging yourself each meal (just because something's healthy doesn't mean 5000 calories of it is healthy) you're body will find it's natural weight. Assuming you're a male, you might even be getting ready for a final growth spurt.

There is no such thing as an ideal weight. As a teenager you need to consume enough fats, carbs and calories to ensure healthy development. Trust me being 5 to 10 lbs less will not necessarily make you faster, I would argue that the decrease caloric intake will weaken your body and could just as easily make you slower.

Yeah I am male, that is very true and my parents have told me this could be the case. My 19 year old brother is 6ft1 so I could as you said be getting ready for a final growth spurt. Thanks for the reply!

Yeah I have been very hesitant about decreasing caloric intake as i do feel like i'll lose a ton of energy and power etc. Thanks for reply

Don't know if you're still reading this thread but I am 5'9.5" and weigh between 155-160. I do have a bit more muscle on me than most runners but I eat real healthy (track my calories and exercise through an app) and I feel like 155 is a great weight for racing any distance for me. It does differ between people depending on body type and other factors, but I would say you shouldn't worry about it too much. Just run, eat, and be healthy. Your weight will end up at wherever it is supposed to end up if you train right.