A private Indian school up in Montana, Wattsamatta University has a 23 year old head coach, Rocky. He coaches both men's and women's xc and T&F. He has a couple of assistants as he flies about his duties, but he has all responsibility.....It's his bag of nuts.
Ryan Vanhoy at Ole Miss is pretty young, I think 25 or so. Pretty young for a coach in the sec. I can't think of any others that young. It is the sec which obviously isn't the most dominant conference but isn't too horrible. Pretty impressive for him.
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Ryan VanHoy is NOT the head XC coach at Old Miss. Brian O'Neal is both the Head Track and XC coach there. He makes all critical decisions and all credit/blame rests with him, alone. The XC coaches at Old Miss dont even get to SPEAK. Hint: try to find a press release where anyone other than O'Neal has a comment (during either track or XC seasons).
Michael Hoffman graduated from Harvard in 2012 and is now head cross country coach at newly D-1 school Grand Canyon University in Phoenix, AZ