AMES, Iowa -- Big 12 Conference cross country has come full circle.  Iowa State, which hosted the inaugural league race in 1996, plays host to the league championship races Saturday at the ISU Cross Country Course. The Iowa State men’s team figures as a dark horse for the team title while an inexperienced Iowa State women’s team that is redshirting its top two runners will try to exceed expectations.  The 6,000-meter women’s race is at 10 a.m. and the 8,000-meter men’s race will start at 11 a.m.