I live in Breckinridge county and I ride at royal atv alot. Me and my buddy rides there both on yellow 400EXs. Mine is the old style race cut and his is 05 newer style with nerfs. I know the hills your talkin about lol I never tried them because I had 18" tires. I went down a real steep rocky hill and a guy rolled his 2010 KFX450R right behind me lol